Fix ARM compilation error.

Removed implementation of function which was no longer member of class Debug.

TBR=lrn@chromium.org
Review URL: http://codereview.chromium.org/199063

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2864 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/arm/debug-arm.cc

@@ -179,12 +179,6 @@ void Debug::GenerateReturnDebugBreak(MacroAssembler* masm) {
 }
 
 
-void Debug::GenerateReturnDebugBreakEntry(MacroAssembler* masm) {
-  // Generate nothing as this handling of debug break return is not done this
-  // way on ARM  - yet.
-}
-
-
 void Debug::GenerateStubNoRegistersDebugBreak(MacroAssembler* masm) {
   // Generate nothing as CodeStub CallFunction is not used on ARM.
 }