[ChromeDriver] Remove reference_builds folder

Change-Id: I17c526f863a8ef5bdb605faca22fab5ce2b720a5
diff --git a/reference_builds/chromedriver_linux64 b/reference_builds/chromedriver_linux64
deleted file mode 100755
index 7066eef..0000000
--- a/reference_builds/chromedriver_linux64
+++ /dev/null
Binary files differ
diff --git a/reference_builds/chromedriver_mac b/reference_builds/chromedriver_mac
deleted file mode 100755
index 517df09..0000000
--- a/reference_builds/chromedriver_mac
+++ /dev/null
Binary files differ
diff --git a/reference_builds/chromedriver_win.exe b/reference_builds/chromedriver_win.exe
deleted file mode 100755
index 4ad51f0..0000000
--- a/reference_builds/chromedriver_win.exe
+++ /dev/null
Binary files differ