Fix tests broken by default text color change.

sky/tests/clipping/clipping-transforms.sky

Index: sky/tests/clipping/clipping-transforms.sky
diff --git a/sky/tests/clipping/clipping-transforms.sky b/sky/tests/clipping/clipping-transforms.sky
deleted file mode 100644
index 762d06a6ba8b3bf49cfb3c0a1094ae150b6bffa3..0000000000000000000000000000000000000000
--- a/sky/tests/clipping/clipping-transforms.sky
+++ /dev/null
@@ -1,28 +0,0 @@
-<import src="../resources/run-after-display.sky" />
-
-<style>
-transformer {
-  transform: translateY(-500px);
-}
-child {
-  opacity: 0.5;
-  background-image: linear-gradient(green, yellow);
-  height: 1900px;
-}
-</style>
-<transformer>
-  <child />
-</transformer>
-
-<script>
-import "dart:sky";
-import "dart:sky.internals" as internals;
-
-void main() {
-  window.addEventListener('load', (_) {
-    runAfterDisplay(() {
-      internals.notifyTestComplete("");
-    });
-  });
-}
-</script>