[css-writing-modes-3] Delete tests obsoleted by ##18122 (#18125)

diff --git a/css/css-writing-modes/wm-propagation-body-003-ref.xht b/css/css-writing-modes/wm-propagation-body-003-ref.xht
deleted file mode 100644
index 1f83fda..0000000
--- a/css/css-writing-modes/wm-propagation-body-003-ref.xht
+++ /dev/null
@@ -1,37 +0,0 @@
-<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
-
-<html xmlns="http://www.w3.org/1999/xhtml">
-
- <head>
-
-  <title>CSS Reftest Reference</title>
-
-  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" />
-
-  <meta content="image" name="flags" />
-
-  <style type="text/css"><![CDATA[
-  img
-    {
-      vertical-align: top;
-    }
-
-  img + img
-    {
-      padding-left: 1em;
-    }
-  ]]></style>
- </head>
-
- <body>
-
-  <div><img src="support/swatch-orange.png" width="100" height="100" alt="Image download support must be enabled" /><img src="support/wm-propagation-body-003-exp-res.png" width="340" height="37" alt="Image download support must be enabled" /></div>
-
-  <!--
-  The image says:
-  Test passes if there is an orange square
-  in the <strong>upper-left corner</strong> of the page.
-  -->
-
- </body>
-</html>
diff --git a/css/css-writing-modes/wm-propagation-body-006.xht b/css/css-writing-modes/wm-propagation-body-006.xht
deleted file mode 100644
index 93b5236..0000000
--- a/css/css-writing-modes/wm-propagation-body-006.xht
+++ /dev/null
@@ -1,51 +0,0 @@
-<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
-
-<html xmlns="http://www.w3.org/1999/xhtml">
-
- <head>
-
-  <title>CSS Writing Modes Test: 'writing-mode: vertical-rl' set to body element propagates to viewport</title>
-
-  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" />
-  <link rel="help" href="https://www.w3.org/TR/css-writing-modes-3/#principal-flow" title="8. The Principal Writing Mode" />
-  <link rel="bookmark" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1102175" title="Bug 1102175: &lt;body&gt; with writing-mode: vertical-rl does not align children to the right " />
-  <link rel="match" href="block-flow-direction-025-ref.xht" />
-
-  <meta name="flags" content="image" />
-  <meta name="assert" content="This test checks that when the root element has a &lt;body&gt; child element, then the principal writing mode is instead taken from the values of writing-mode and direction on the first such child element instead of taken from the root element." />
-
-  <style type="text/css"><![CDATA[
-  html
-    {
-      writing-mode: horizontal-tb;
-    }
-
-  body
-    {
-      writing-mode: vertical-rl;
-    }
-
-  div
-    {
-      background-color: blue;
-      height: 100px;
-      width: 100px;
-    }
-  ]]></style>
-
- </head>
-
- <body>
-
-  <div></div>
-
-  <p><img src="support/block-flow-direction-025-exp-res.png" width="359" height="36" alt="Image download support must be enabled" /></p>
-
-  <!--
-  The image says:
-  Test passes if there is a blue square in the
-  <strong>upper-right corner</strong> of the page.
-  -->
-
- </body>
-</html>
diff --git a/css/css-writing-modes/wm-propagation-body-008.xht b/css/css-writing-modes/wm-propagation-body-008.xht
deleted file mode 100644
index feeb857..0000000
--- a/css/css-writing-modes/wm-propagation-body-008.xht
+++ /dev/null
@@ -1,49 +0,0 @@
-<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
-
-<html xmlns="http://www.w3.org/1999/xhtml">
-
- <head>
-
-  <title>CSS Writing Modes Test: 'writing-mode: sideways-rl' set to body element propagates to viewport</title>
-
-  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" />
-  <link rel="help" href="https://www.w3.org/TR/css-writing-modes-4/#principal-flow" title="8. The Principal Writing Mode" />
-  <link rel="match" href="block-flow-direction-025-ref.xht" />
-
-  <meta name="flags" content="image" />
-  <meta name="assert" content="This test checks that when the root element has a &lt;body&gt; child element, then the principal writing mode is instead taken from the values of writing-mode and direction on the first such child element instead of taken from the root element." />
-
-  <style type="text/css"><![CDATA[
-  html
-    {
-      writing-mode: horizontal-tb;
-    }
-
-  body
-    {
-      writing-mode: sideways-rl;
-    }
-
-  div
-    {
-      background-color: blue;
-      height: 100px;
-      width: 100px;
-    }
-  ]]></style>
- </head>
-
- <body>
-
-  <div></div>
-
-  <p><img src="support/block-flow-direction-025-exp-res.png" width="359" height="36" alt="Image download support must be enabled" /></p>
-
-  <!--
-  The image says:
-  Test passes if there is a blue square in the
-  <strong>upper-right corner</strong> of the page.
-  -->
-
- </body>
-</html>
diff --git a/css/css-writing-modes/wm-propagation-body-010.xht b/css/css-writing-modes/wm-propagation-body-010.xht
deleted file mode 100644
index d74f5a6..0000000
--- a/css/css-writing-modes/wm-propagation-body-010.xht
+++ /dev/null
@@ -1,48 +0,0 @@
-<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
-
-<html xmlns="http://www.w3.org/1999/xhtml">
-
- <head>
-
-  <title>CSS Writing Modes Test: 'writing-mode: horizontal-tb' set to body element propagates to viewport</title>
-
-  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" />
-  <link rel="help" href="https://www.w3.org/TR/css-writing-modes-3/#principal-flow" title="8. The Principal Writing Mode" />
-  <link rel="match" href="wm-propagation-body-003-ref.xht" />
-
-  <meta name="flags" content="image" />
-  <meta name="assert" content="This test checks that when the root element has a &lt;body&gt; child element, then the principal writing mode is instead taken from the values of writing-mode and direction on the first such child element instead of taken from the root element." />
-
-  <style type="text/css"><![CDATA[
-  html
-    {
-      writing-mode: vertical-rl;
-    }
-
-  body
-    {
-      writing-mode: horizontal-tb;
-    }
-
-  img#orange-square
-    {
-      height: 100px;
-      padding-right: 1em;
-      vertical-align: top;
-      width: 100px;
-    }
-  ]]></style>
- </head>
-
- <body>
-
-  <div><img id="orange-square" src="support/swatch-orange.png" alt="Image download support must be enabled" /><img src="support/wm-propagation-body-003-exp-res.png" width="340" height="37" alt="Image download support must be enabled" /></div>
-
-  <!--
-  The image says:
-  Test passes if there is an orange square
-  in the <strong>upper-left corner</strong> of the page.
-  -->
-
- </body>
-</html>
diff --git a/css/css-writing-modes/wm-propagation-body-011.xht b/css/css-writing-modes/wm-propagation-body-011.xht
deleted file mode 100644
index 40e181b..0000000
--- a/css/css-writing-modes/wm-propagation-body-011.xht
+++ /dev/null
@@ -1,49 +0,0 @@
-<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
-
-<html xmlns="http://www.w3.org/1999/xhtml">
-
- <head>
-
-  <title>CSS Writing Modes Test: 'writing-mode: vertical-lr' set to body element propagates to viewport</title>
-
-  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" />
-  <link rel="help" href="https://www.w3.org/TR/css-writing-modes-3/#principal-flow" title="8. The Principal Writing Mode" />
-  <link rel="match" href="wm-propagation-body-003-ref.xht" />
-
-  <meta name="flags" content="image" />
-  <meta name="assert" content="This test checks that when the root element has a &lt;body&gt; child element, then the principal writing mode is instead taken from the values of writing-mode and direction on the first such child element instead of taken from the root element." />
-
-  <style type="text/css"><![CDATA[
-  html
-    {
-      writing-mode: vertical-rl;
-    }
-
-  body
-    {
-      writing-mode: vertical-lr;
-    }
-
-  div
-    {
-      background-color: orange;
-      height: 100px;
-      width: 100px;
-    }
-  ]]></style>
- </head>
-
- <body>
-
-  <div></div>
-
-  <p><img src="support/wm-propagation-body-003-exp-res.png" width="340" height="37" alt="Image download support must be enabled" /></p>
-
-  <!--
-  The image says:
-  Test passes if there is an orange square
-  in the <strong>upper-left corner</strong> of the page.
-  -->
-
- </body>
-</html>
diff --git a/css/css-writing-modes/wm-propagation-body-015.xht b/css/css-writing-modes/wm-propagation-body-015.xht
deleted file mode 100644
index 82fae37..0000000
--- a/css/css-writing-modes/wm-propagation-body-015.xht
+++ /dev/null
@@ -1,50 +0,0 @@
-<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
-
-<html xmlns="http://www.w3.org/1999/xhtml">
-
- <head>
-
-  <title>CSS Writing Modes Test: 'writing-mode: vertical-rl' set to body element propagates to viewport</title>
-
-  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" />
-  <link rel="help" href="https://www.w3.org/TR/css-writing-modes-3/#principal-flow" title="8. The Principal Writing Mode" />
-  <link rel="match" href="block-flow-direction-025-ref.xht" />
-
-  <meta name="flags" content="image" />
-  <meta name="assert" content="This test checks that when the root element has a &lt;body&gt; child element, then the principal writing mode is instead taken from the values of writing-mode and direction on the first such child element instead of taken from the root element." />
-
-  <style type="text/css"><![CDATA[
-  html
-    {
-      writing-mode: vertical-lr;
-    }
-
-  body
-    {
-      writing-mode: vertical-rl;
-    }
-
-  div
-    {
-      background-color: blue;
-      height: 100px;
-      width: 100px;
-    }
-  ]]></style>
-
- </head>
-
- <body>
-
-  <div></div>
-
-  <p><img src="support/block-flow-direction-025-exp-res.png" width="359" height="36" alt="Image download support must be enabled" /></p>
-
-  <!--
-  The image says:
-  Test passes if there is a blue square in the
-  <strong>upper-right corner</strong> of the page.
-  -->
-
- </body>
-</html>