Revert "Create a RegisterSpec class inside of the IC that provides:"

src/mips/ic-mips.cc

Index: src/mips/ic-mips.cc
diff --git a/src/mips/ic-mips.cc b/src/mips/ic-mips.cc
index 2316933a0a2eacd391d304a63cd87ae3c5bfc780..cbf721adb8c8ec9ae7dc70039a4af2f885310f5d 100644
--- a/src/mips/ic-mips.cc
+++ b/src/mips/ic-mips.cc
@@ -560,17 +560,6 @@ void KeyedLoadIC::GenerateMiss(MacroAssembler* masm) {
 }
 
 
-// IC register specifications
-Register LoadIC::kReceiverRegister = a0;
-Register LoadIC::kNameRegister = a2;
-const Register LoadIC::registers[] = { kReceiverRegister, kNameRegister };
-
-
-Register KeyedLoadIC::kReceiverRegister = a1;
-Register KeyedLoadIC::kNameRegister = a0;
-const Register KeyedLoadIC::registers[] = { kReceiverRegister, kNameRegister };
-
-
 void KeyedLoadIC::GenerateRuntimeGetProperty(MacroAssembler* masm) {
   // ---------- S t a t e --------------
   //  -- ra     : return address