Bug 933562 - Annotate a few tests that have landed in the meantime.

MANUAL PUSH: orange in a CLOSED TREE

testing/web-platform/meta/css/selectors/is-default-ns-003.html.ini

@@ -0,0 +1,3 @@
+[is-default-ns-003.html]
+  expected: FAIL
+  issue: https://github.com/w3c/csswg-drafts/issues/5684

testing/web-platform/meta/css/selectors/is-where-not.html.ini

@@ -1,7 +0,0 @@
-[is-where-not.html]
-  [:not(:is(div > :not(#e))) matches expected elements]
-    expected: FAIL
-
-  [:not(:is(div > :not(:where(#e, #f)))) matches expected elements]
-    expected: FAIL
-