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

sky/tests/animation/basic-transition.sky

Index: sky/tests/animation/basic-transition.sky
diff --git a/sky/tests/animation/basic-transition.sky b/sky/tests/animation/basic-transition.sky
deleted file mode 100644
index 7fa2218d38d91a66fe79f7ffa6a83012d7ceb204..0000000000000000000000000000000000000000
--- a/sky/tests/animation/basic-transition.sky
+++ /dev/null
@@ -1,31 +0,0 @@
-<sky>
-<import src="../resources/chai.sky" />
-<import src="../resources/mocha.sky" />
-<div></div>
-<style>
-div {
-  width: 100px;
-  height: 100px;
-  background: red;
-  position: relative;
-  transition: width  2s;
-  transition-timing-function: linear;
-}
-
-div#example {
-  width: 200px;
-}
-</style>
-<script>
-var example = document.querySelector('div');
-example.offsetWidth; // force a style resolution so that next line's assigment triggers the transition
-example.id = "example";
-
-describe('width', function() {
-  it('should transition from 100px to 200px', function() {
-    internals.pauseAnimations(1);
-    assert.equal('150px', getComputedStyle(example).width);
-  });
-});
-</script>
-</sky>