MIPS: JALR to JAL optimization removal

src/mips/assembler-mips.h

Index: src/mips/assembler-mips.h
diff --git a/src/mips/assembler-mips.h b/src/mips/assembler-mips.h
index da9762024216eca087955fd463e77a5396d71ca4..e048bb6eb691158e0914d0068baca975d5113828 100644
--- a/src/mips/assembler-mips.h
+++ b/src/mips/assembler-mips.h
@@ -477,8 +477,6 @@ class Assembler : public AssemblerBase {
   // of that call in the instruction stream.
   inline static Address target_address_from_return_address(Address pc);
 
-  static void JumpToJumpRegister(Address pc);
-
   static void QuietNaN(HeapObject* nan);
 
   // This sets the branch destination (which gets loaded at the call address).