w3c deps roll for layout tests: remove entries from test_expectations_w3c.txt

As they have now been upstreamed.

This is patch 6 of 6 and completes the roll.

TBR=phoglund@chromium.org
BUG=404022

Review URL: https://codereview.chromium.org/471323002

Cr-Commit-Position: refs/heads/master@{#290154}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@290154 0039d316-1c4b-4281-b951-d872f2087c98

webkit/tools/layout_tests/test_expectations_w3c.txt

@@ -11,8 +11,3 @@
 # Expectations to upstream into blink after the next W3C roll has rolled into Blink.
 # 
 
-crbug.com/330083 w3c/web-platform-tests/shadow-dom/shadow-trees/content-pseudo-element/test-001.html [ Failure ]
-crbug.com/330083 w3c/web-platform-tests/shadow-dom/shadow-trees/content-pseudo-element/test-002.html [ Failure ]
-crbug.com/330083 w3c/web-platform-tests/custom-elements/instantiating-custom-elements/extensions-to-document-interface/create-element-interface-type-is-a-type-extension.html [ Failure ]
-crbug.com/330083 w3c/web-platform-tests/custom-elements/registering-custom-elements/definition-construction-algorithm-name-is-null.html [ Failure ]
-crbug.com/330083 w3c/web-platform-tests/custom-elements/registering-custom-elements/definition-construction-algorithm-svg-namespace-name-is-null.html [ Failure ]