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

src/arm64/macro-assembler-arm64.cc

Index: src/arm64/macro-assembler-arm64.cc
diff --git a/src/arm64/macro-assembler-arm64.cc b/src/arm64/macro-assembler-arm64.cc
index 896b4f9a4431cbc9425cf313f37dc5945df4f066..184bbf74c45c49a8dd9bbbed950816b9c16c580a 100644
--- a/src/arm64/macro-assembler-arm64.cc
+++ b/src/arm64/macro-assembler-arm64.cc
@@ -2890,15 +2890,6 @@ void MacroAssembler::LoadContext(Register dst, int context_chain_length) {
 }
 
 
-void MacroAssembler::DebugBreak() {
-  Mov(x0, 0);
-  Mov(x1, ExternalReference(Runtime::kHandleDebuggerStatement, isolate()));
-  CEntryStub ces(isolate(), 1);
-  DCHECK(AllowThisStubCall(&ces));
-  Call(ces.GetCode(), RelocInfo::DEBUGGER_STATEMENT);
-}
-
-
 void MacroAssembler::PushStackHandler() {
   DCHECK(jssp.Is(StackPointer()));
   // Adjust this code if the asserts don't hold.