Revert suppression for an uninitialized read in ANGLE, which was rolled in r307087.

This reverts r304504.

TBR=jmadill@chromium.org
NOTRY=true
BUG=434033

Review URL: https://codereview.chromium.org/806773007

Cr-Commit-Position: refs/heads/master@{#308463}

tools/valgrind/drmemory/suppressions_full.txt

@@ -1871,19 +1871,6 @@ system call NtCreateFile parameter #9
 MSWSOCK.dll!*
 content.dll!content::AppCacheStorageImpl::DatabaseTask::CallRun
 
-UNINITIALIZED READ
-name=bug_434033
-*!`anonymous namespace'::TOutputTraverser::visitConstantUnion
-*!TIntermBinary::traverse
-*!TIntermBinary::traverse
-*!TIntermAggregate::traverse
-*!TIntermAggregate::traverse
-*!TIntermAggregate::traverse
-*!TIntermediate::outputTree
-*!TCompiler::compile
-*!TypeTrackingTest::compile
-*!TypeTrackingTest_StructConstructorResultNoPrecision_Test::TestBody
-
 UNADDRESSABLE ACCESS
 name=bug_436131
 *!ash::test::ShelfViewTestAPI::RunMessageLoopUntilAnimationsDone