Remove hacks for GC stress builders from cctests.

test/cctest/test-api.cc

Index: test/cctest/test-api.cc
diff --git a/test/cctest/test-api.cc b/test/cctest/test-api.cc
index d20d27c60c6f7d17c00f74756ffc6d7ad8ba7968..b1e82aae224c7d7b08864d7dd61e3acea72e181f 100644
--- a/test/cctest/test-api.cc
+++ b/test/cctest/test-api.cc
@@ -12287,9 +12287,6 @@ void ApiTestFuzzer::TearDown() {
 
 // Lets not be needlessly self-referential.
 TEST(Threading1) {
-  // TODO(mstarzinger): Disabled in GC stress mode for now, we should find the
-  // correct timeout for this an re-enable this test again
-  if (i::FLAG_stress_compaction) return;
   ApiTestFuzzer::SetUp(ApiTestFuzzer::FIRST_PART);
   ApiTestFuzzer::RunAllTests();
   ApiTestFuzzer::TearDown();