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

src/arm64/macro-assembler-arm64.h

 // 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.
 
 #ifndef V8_ARM64_MACRO_ASSEMBLER_ARM64_H_
 #define V8_ARM64_MACRO_ASSEMBLER_ARM64_H_
 
 #include <vector>
 
 #include "src/arm64/assembler-arm64.h"
@@ skipping 1282 matching lines @@
       masm_->use_real_aborts_ = false;
     }
     ~NoUseRealAbortsScope() {
       masm_->use_real_aborts_ = saved_;
     }
    private:
     bool saved_;
     MacroAssembler* masm_;
   };
 
-  // ---------------------------------------------------------------------------
-  // Debugger Support
-
-  void DebugBreak();
+  // Frame restart support
   void MaybeDropFrames();
 
-  // ---------------------------------------------------------------------------
   // Exception handling
 
   // Push a new stack handler and link into stack handler chain.
   void PushStackHandler();
 
   // Unlink the stack handler on top of the stack from the stack handler chain.
   // Must preserve the result register.
   void PopStackHandler();
 
 
@@ skipping 862 matching lines @@
   class RegisterBits : public BitField<unsigned, 0, 5> {};
   class DeltaBits : public BitField<uint32_t, 5, 32-5> {};
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #define ACCESS_MASM(masm) masm->
 
 #endif  // V8_ARM64_MACRO_ASSEMBLER_ARM64_H_