[debugger] remove debugger statement support from FCG/CS.

src/mips64/macro-assembler-mips64.cc

Index: src/mips64/macro-assembler-mips64.cc
diff --git a/src/mips64/macro-assembler-mips64.cc b/src/mips64/macro-assembler-mips64.cc
index 3d952eba0963e70df19b7ebcd3c4c8be18601989..849327e60b70691a958f707149e97bb9de4e2859 100644
--- a/src/mips64/macro-assembler-mips64.cc
+++ b/src/mips64/macro-assembler-mips64.cc
@@ -4040,16 +4040,6 @@ void MacroAssembler::PopRegisterAsTwoSmis(Register dst, Register scratch) {
   or_(dst, dst, scratch);
 }
 
-
-void MacroAssembler::DebugBreak() {
-  PrepareCEntryArgs(0);
-  PrepareCEntryFunction(
-      ExternalReference(Runtime::kHandleDebuggerStatement, isolate()));
-  CEntryStub ces(isolate(), 1);
-  DCHECK(AllowThisStubCall(&ces));
-  Call(ces.GetCode(), RelocInfo::DEBUGGER_STATEMENT);
-}
-
 void MacroAssembler::MaybeDropFrames() {
   // Check whether we need to drop frames to restart a function on the stack.
   ExternalReference restart_fp =