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

sky/tests/layout/position-absolute.sky

Index: sky/tests/layout/position-absolute.sky
diff --git a/sky/tests/layout/position-absolute.sky b/sky/tests/layout/position-absolute.sky
deleted file mode 100644
index 82217a04e74ba5283d47675854c6e2b08b3ecebe..0000000000000000000000000000000000000000
--- a/sky/tests/layout/position-absolute.sky
+++ /dev/null
@@ -1,49 +0,0 @@
-<import src="../resources/dump-as-render-tree.sky" />
-
-<style>
-  block, p, flex {
-    width: 100px;
-    height: 100px;
-    margin-bottom: 50px;
-    /* Make it a positioning root. */
-    transform: translate3d(0, 0, 0);
-  }
-  block { background: pink; }
-  p {
-    background: orange;
-  }
-  flex {
-    background: salmon;
-    display: flex;
-    flex-direction: row;
-  }
-  spacer {
-    height: 30px;
-    width: 30px;
-    border: 5px solid purple;
-    background: papayawhip;
-  }
-  absolute {
-    position: absolute;
-    width: 20px;
-    height: 20px;
-    background: green;
-  }
-</style>
-<block>
-  <spacer />
-  <absolute />
-  <spacer />
-</block>
-
-<p>
-  <spacer />
-  <absolute />
-  <spacer />
-</p>
-
-<flex>
-  <spacer />
-  <absolute />
-  <spacer />
-</flex>