Remove --harmony-async-await runtime flag

test/debugger/debug/es8/async-debug-caught-exception-cases2.js

Index: test/debugger/debug/es8/async-debug-caught-exception-cases2.js
diff --git a/test/js-perf-test/RegExp/flags.js b/test/debugger/debug/es8/async-debug-caught-exception-cases2.js
similarity index 66%
copy from test/js-perf-test/RegExp/flags.js
copy to test/debugger/debug/es8/async-debug-caught-exception-cases2.js
index b0303ddd7d3a00d68e84690bd8b170646f644c6a..58dcb476cf54e68e28577a012e35c447f148ed38 100644
--- a/test/js-perf-test/RegExp/flags.js
+++ b/test/debugger/debug/es8/async-debug-caught-exception-cases2.js
@@ -2,7 +2,6 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-load("base.js");
-load("base_flags.js");
+// Files: test/debugger/debug/es8/async-debug-caught-exception-cases.js
 
-createBenchmarkSuite("Flags");
+runPart(2);