base: Remove using declaration from test_suite.h header.

base/test/test_suite.h

Index: base/test/test_suite.h
diff --git a/base/test/test_suite.h b/base/test/test_suite.h
index fa0ab6c4cf9a225da7cb1d9ce7a03fbfe2826ee9..cf0dd3aec3ae6f145359e517c884503aafd13fed 100644
--- a/base/test/test_suite.h
+++ b/base/test/test_suite.h
@@ -90,8 +90,4 @@ class TestSuite {
 
 }  // namespace base
 
-// TODO(brettw) remove this. This is a temporary hack to allow WebKit to compile
-// until we can update it to use "base::" (preventing a two-sided patch).
-using base::TestSuite;
-
 #endif  // BASE_TEST_TEST_SUITE_H_