Timeline: get rid of some rarely used test helper methods

third_party/WebKit/LayoutTests/TestExpectations

Index: third_party/WebKit/LayoutTests/TestExpectations
diff --git a/third_party/WebKit/LayoutTests/TestExpectations b/third_party/WebKit/LayoutTests/TestExpectations
index 8c6475563c40d81cd226a3d7b973de1578255fea..dcf0aded63931e6717de617247529fdebcf0d92b 100644
--- a/third_party/WebKit/LayoutTests/TestExpectations
+++ b/third_party/WebKit/LayoutTests/TestExpectations
@@ -2317,9 +2317,6 @@ crbug.com/657748 imported/csswg-test/css-display-3/display-contents-text-only-00
 
 crbug.com/676229 [ Linux ] plugins/mouse-click-plugin-clears-selection.html [ Failure Pass ]
 
-crbug.com/677145 inspector/tracing/timeline-js/timeline-script-tag-1.html [ Pass Failure ]
-crbug.com/677145 virtual/threaded/inspector/tracing/timeline-js/timeline-script-tag-1.html [ Pass Failure ]
-
 crbug.com/678346 [ Win7 Debug ] fast/dom/shadow/selections-in-shadow.html [ Pass Timeout ]
 crbug.com/678346 [ Win7 Debug ] storage/indexeddb/index-cursor.html [ Pass Timeout ]
 crbug.com/678346 [ Win7 Debug ] storage/indexeddb/mozilla/test_objectStore_openKeyCursor.html [ Pass Timeout ]