MIPS: Drop IsPregenerated() and allow_stub_calls flag.

src/mips/macro-assembler-mips.h

Index: src/mips/macro-assembler-mips.h
diff --git a/src/mips/macro-assembler-mips.h b/src/mips/macro-assembler-mips.h
index 4bf3e8913317d254bd5d9f48db892a918579b334..4e30c353e2c25c5cafa6624f018abc639a9ccbcd 100644
--- a/src/mips/macro-assembler-mips.h
+++ b/src/mips/macro-assembler-mips.h
@@ -1348,8 +1348,6 @@ class MacroAssembler: public Assembler {
   // Verify restrictions about code generated in stubs.
   void set_generating_stub(bool value) { generating_stub_ = value; }
   bool generating_stub() { return generating_stub_; }
-  void set_allow_stub_calls(bool value) { allow_stub_calls_ = value; }
-  bool allow_stub_calls() { return allow_stub_calls_; }
   void set_has_frame(bool value) { has_frame_ = value; }
   bool has_frame() { return has_frame_; }
   inline bool AllowThisStubCall(CodeStub* stub);
@@ -1646,7 +1644,6 @@ class MacroAssembler: public Assembler {
   MemOperand SafepointRegistersAndDoublesSlot(Register reg);
 
   bool generating_stub_;
-  bool allow_stub_calls_;
   bool has_frame_;
   // This handle will be patched with the code object on installation.
   Handle<Object> code_object_;