[stubs] Port LoadFunctionPrototypeStub to CSA

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 43916f8ef570276af2c5370950019f0dd69af799..a498bad10a314f99b76b5a0f0da69131ff01a89d 100644
--- a/src/mips64/macro-assembler-mips64.h
+++ b/src/mips64/macro-assembler-mips64.h
@@ -1164,14 +1164,6 @@ class MacroAssembler: public Assembler {
   void GetMapConstructor(Register result, Register map, Register temp,
                          Register temp2);
 
-  // Try to get function prototype of a function and puts the value in
-  // the result register. Checks that the function really is a
-  // function and jumps to the miss label if the fast checks fail. The
-  // function register will be untouched; the other registers may be
-  // clobbered.
-  void TryGetFunctionPrototype(Register function, Register result,
-                               Register scratch, Label* miss);
-
   void GetObjectType(Register function,
                      Register map,
                      Register type_reg);