Remove --stop-at flag from several backends.

src/full-codegen/arm64/full-codegen-arm64.cc

Index: src/full-codegen/arm64/full-codegen-arm64.cc
diff --git a/src/full-codegen/arm64/full-codegen-arm64.cc b/src/full-codegen/arm64/full-codegen-arm64.cc
index 02ae248315f838d3fd0ddff1c5b1cc1b36776951..de356e9afbdfd3bb31749e963f3331ced241dbf3 100644
--- a/src/full-codegen/arm64/full-codegen-arm64.cc
+++ b/src/full-codegen/arm64/full-codegen-arm64.cc
@@ -110,13 +110,6 @@ void FullCodeGenerator::Generate() {
 
   ProfileEntryHookStub::MaybeCallEntryHook(masm_);
 
-#ifdef DEBUG
-  if (strlen(FLAG_stop_at) > 0 &&
-      info->literal()->name()->IsUtf8EqualTo(CStrVector(FLAG_stop_at))) {
-    __ Debug("stop-at", __LINE__, BREAK);
-  }
-#endif
-
   if (FLAG_debug_code && info->ExpectsJSReceiverAsReceiver()) {
     int receiver_offset = info->scope()->num_parameters() * kXRegSize;
     __ Peek(x10, receiver_offset);