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

src/arm64/macro-assembler-arm64.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_ARM64
 
 #include "src/base/bits.h"
 #include "src/base/division-by-constant.h"
 #include "src/bootstrapper.h"
 #include "src/codegen.h"
@@ skipping 2872 matching lines @@
     }
   } else {
     // Slot is in the current function context.  Move it into the
     // destination register in case we store into it (the write barrier
     // cannot be allowed to destroy the context in cp).
     Mov(dst, cp);
   }
 }
 
 
-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.
   STATIC_ASSERT(StackHandlerConstants::kSize == 1 * kPointerSize);
   STATIC_ASSERT(StackHandlerConstants::kNextOffset == 0 * kPointerSize);
 
   // For the JSEntry handler, we must preserve the live registers x0-x4.
   // (See JSEntryStub::GenerateBody().)
 
   // Link the current handler as the next handler.
@@ skipping 1756 matching lines @@
 }
 
 
 #undef __
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM64