[turbofan] Remove obsolete --turbo-try-catch flag.

test/cctest/test-heap.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 6336 matching lines @@
       "  throw 'message 2';"
       "} finally {"
       "  break L;"
       "}"
       "check();";
   CompileRun(test);
 
   const char* flag = "--turbo-filter=*";
   FlagList::SetFlagsFromString(flag, StrLength(flag));
   FLAG_always_opt = true;
-  FLAG_turbo_try_catch = true;
   FLAG_turbo_try_finally = true;
 
   CompileRun(test);
 }
 
 
 static void CheckEqualSharedFunctionInfos(
     const v8::FunctionCallbackInfo<v8::Value>& args) {
   Handle<Object> obj1 = v8::Utils::OpenHandle(*args[0]);
   Handle<Object> obj2 = v8::Utils::OpenHandle(*args[1]);
@@ skipping 325 matching lines @@
   // The CollectGarbage call above starts sweeper threads.
   // The crash will happen if the following two functions
   // are called before sweeping finishes.
   heap->StartIncrementalMarking();
   heap->FinalizeIncrementalMarkingIfComplete("test");
 }
 
 
 }  // namespace internal
 }  // namespace v8