[ic] Remove unnecessary access rights checks from the IC handlers.

src/ppc/macro-assembler-ppc.h

Index: src/ppc/macro-assembler-ppc.h
diff --git a/src/ppc/macro-assembler-ppc.h b/src/ppc/macro-assembler-ppc.h
index 788984377ca1eee9c654ba17a05ee0b97091b864..28eceb18a41aff43b4be2d824228f59ce66092b7 100644
--- a/src/ppc/macro-assembler-ppc.h
+++ b/src/ppc/macro-assembler-ppc.h
@@ -662,12 +662,6 @@ class MacroAssembler : public Assembler {
   // ---------------------------------------------------------------------------
   // Inline caching support
 
-  // Generate code for checking access rights - used for security checks
-  // on access to global objects across environments. The holder register
-  // is left untouched, whereas both scratch registers are clobbered.
-  void CheckAccessGlobalProxy(Register holder_reg, Register scratch,
-                              Label* miss);
-
   void GetNumberHash(Register t0, Register scratch);
 
   inline void MarkCode(NopMarkerTypes type) { nop(type); }