MIPS: Remove keyed_store_calling convention and friends.

src/mips64/ic-mips64.cc

Index: src/mips64/ic-mips64.cc
diff --git a/src/mips64/ic-mips64.cc b/src/mips64/ic-mips64.cc
index 317e446c785de0dd28ee3dc5631c6cc61c69fb43..9f82945eda3b907b13568b0690ed87948f3fa44c 100644
--- a/src/mips64/ic-mips64.cc
+++ b/src/mips64/ic-mips64.cc
@@ -523,26 +523,11 @@ const Register LoadIC::VectorRegister() {
 }
 
 
-  const Register StoreIC::ReceiverRegister() { return a1; }
+const Register StoreIC::ReceiverRegister() { return a1; }
 const Register StoreIC::NameRegister() { return a2; }
 const Register StoreIC::ValueRegister() { return a0; }
 
 
-const Register KeyedStoreIC::ReceiverRegister() {
-  return StoreIC::ReceiverRegister();
-}
-
-
-const Register KeyedStoreIC::NameRegister() {
-  return StoreIC::NameRegister();
-}
-
-
-const Register KeyedStoreIC::ValueRegister() {
-  return StoreIC::ValueRegister();
-}
-
-
 const Register KeyedStoreIC::MapRegister() {
   return a3;
 }