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

src/mips64/macro-assembler-mips64.h

Index: src/mips64/macro-assembler-mips64.h
diff --git a/src/mips64/macro-assembler-mips64.h b/src/mips64/macro-assembler-mips64.h
index a498bad10a314f99b76b5a0f0da69131ff01a89d..bfb1d520b4dccb7e17781d6d19feb5567fc15b18 100644
--- a/src/mips64/macro-assembler-mips64.h
+++ b/src/mips64/macro-assembler-mips64.h
@@ -1134,13 +1134,9 @@ class MacroAssembler: public Assembler {
                         Register scratch,
                         Label* fail);
 
-  // -------------------------------------------------------------------------
-  // Debugger Support.
-
-  void DebugBreak();
+  // Frame restart support.
   void MaybeDropFrames();
 
-  // -------------------------------------------------------------------------
   // Exception handling.
 
   // Push a new stack handler and link into stack handler chain.