Revert of Import quirks-mode tests

third_party/WebKit/LayoutTests/imported/wpt/quirks-mode/supports.html

-<!-- quirks -->
-<title>Syntax quirks in @supports/CSS.supports</title>
-<script src="../../../resources/testharness.js"></script>
-<script src="../../../resources/testharnessreport.js"></script>
-<link rel=help href=https://drafts.csswg.org/css-conditional/#at-supports>
-<link rel=help href=https://drafts.csswg.org/css-conditional/#the-css-interface>
-<link rel=help href=https://quirks.spec.whatwg.org/#the-hashless-hex-color-quirk>
-<link rel=help href=https://quirks.spec.whatwg.org/#the-unitless-length-quirk>
-<style>
- /* sanity check */
- @supports (background-color: lime) { #a { background-color: lime } }
- @supports (background-position: 1px 1px) { #a { background-position: 1px 1px } }
- /* test */
- @supports (background-color: 00ff00) { #b { background-color: 00ff00 } }
- @supports (background-position: 1 1) { #b { background-position: 1 1 } }
-</style>
-<div id=a></div>
-<div id=b></div>
-<div id=c></div> <!--  c unstyled  -->
-<script>
-var a = document.getElementById('a');
-var b = document.getElementById('b');
-var c = document.getElementById('c');
-
-test(function() {
-  assert_not_equals(getComputedStyle(a).backgroundColor, getComputedStyle(c).backgroundColor);
-}, 'Sanity check @supports color');
-
-test(function() {
-  assert_equals(getComputedStyle(b).backgroundColor, getComputedStyle(a).backgroundColor);
-}, '@supports quirky color');
-
-test(function() {
-  assert_false(CSS.supports('background-color', '00ff00'));
-}, 'CSS.supports() quirky color');
-
-test(function() {
-  assert_not_equals(getComputedStyle(a).backgroundPosition, getComputedStyle(c).backgroundPosition);
-}, 'Sanity check @supports length');
-
-test(function() {
-  assert_equals(getComputedStyle(b).backgroundPosition, getComputedStyle(a).backgroundPosition);
-}, '@supports quirky length');
-
-test(function() {
-  assert_false(CSS.supports('background-position', '1 1'));
-}, 'CSS.supports() quirky length');
-</script>