[css-color-4] Remove tests for color() fallback (#28435)

diff --git a/css/css-color/predefined-014.html b/css/css-color/predefined-014.html
deleted file mode 100644
index 76903b9..0000000
--- a/css/css-color/predefined-014.html
+++ /dev/null
@@ -1,17 +0,0 @@
-<!DOCTYPE html>
-<meta charset="utf-8">
-<title>CSS Color 4: predefined colorspaces, fallback</title>
-<link rel="author" title="Chris Lilley" href="mailto:chris@w3.org">
-<link rel="help" href="https://drafts.csswg.org/css-color-4/#predefined">
-<link rel="match" href="greensquare-090-ref.html">
-<meta name="assert" content="Color function with invalid colorspace, fallback matches sRGB #009900">
-<style>
-    .test { background-color: red; width: 12em; height: 6em; margin-top:0}
-    .ref { background-color: #009900; width: 12em; height: 6em; margin-bottom: 0}
-    .test {background-color: color(banana 0.1 0.2 0.3, #009900)}
-</style>
-<body>
-    <p>Test passes if you see a green square, and no red.</p>
-    <p class="ref"> </p>
-    <p class="test"> </p>
-</body>
\ No newline at end of file
diff --git a/css/css-color/predefined-015.html b/css/css-color/predefined-015.html
deleted file mode 100644
index 50ca436..0000000
--- a/css/css-color/predefined-015.html
+++ /dev/null
@@ -1,17 +0,0 @@
-<!DOCTYPE html>
-<meta charset="utf-8">
-<title>CSS Color 4: predefined colorspaces, fallback</title>
-<link rel="author" title="Chris Lilley" href="mailto:chris@w3.org">
-<link rel="help" href="https://drafts.csswg.org/css-color-4/#predefined">
-<link rel="match" href="greensquare-090-ref.html">
-<meta name="assert" content="Color function with colorspace which matches sRGB #009900, red fallback">
-<style>
-    .test { background-color: red; width: 12em; height: 6em; margin-top:0}
-    .ref { background-color: #009900; width: 12em; height: 6em; margin-bottom: 0}
-    .test {background-color: color(display-p3 0.26374 0.59085 0.16434, red)}
-</style>
-<body>
-    <p>Test passes if you see a green square, and no red.</p>
-    <p class="ref"> </p>
-    <p class="test"> </p>
-</body>
\ No newline at end of file