Remove Sky tests that we don't intend to port to the new world

sky/tests/layout/clipping-elementFromPoint.sky

Index: sky/tests/layout/clipping-elementFromPoint.sky
diff --git a/sky/tests/layout/clipping-elementFromPoint.sky b/sky/tests/layout/clipping-elementFromPoint.sky
deleted file mode 100644
index f2bed0b599f97c3e3a0b46ea42e9be3f59f99e42..0000000000000000000000000000000000000000
--- a/sky/tests/layout/clipping-elementFromPoint.sky
+++ /dev/null
@@ -1,39 +0,0 @@
-<style>
-toolbar {
-  background: yellow;
-  width: 50px;
-  height: 50px;
-}
-scrollable {
-  overflow: hidden;
-  height: 400px;
-  background: red;
-}
-content {
-  height: 400px;
-  background-color: pink;
-  transform: translateY(-100px);
-}
-</style>
-<toolbar>toolbar</toolbar>
-<scrollable><content>content</content></scrollable>
-<script>
-import "../resources/third_party/unittest/unittest.dart";
-import "../resources/unit.dart";
-
-import "dart:async";
-import "dart:sky";
-
-void main() {
-  initUnit();
-
-  test("should hit test toolbar", () {
-    expect(document.elementFromPoint(10, 10).textContent, equals("toolbar"));
-  });
-
-  test("should hit test toolbar when transformed, but clipped element overlaps", () {
-    document.querySelector("scrollable").style["transform"] = "translate(0, 0)";
-    expect(document.elementFromPoint(10, 10).textContent, equals("toolbar"));
-  });
-}
-</script>