Revert trivial diffs in MetadataRequest.cpp

Most of the changes were reveted when we support relative pointer

Author: kateinoigakukun

lib/IRGen/MetadataRequest.cpp

@@ -3080,15 +3080,13 @@ emitMetadataAccessByMangledName(IRGenFunction &IGF, CanType type,
                                                        IGM.Int32Ty);
     stringAddrOffset = subIGF.Builder.CreateSExtOrBitCast(stringAddrOffset,
                                                           IGM.SizeTy);
-
-    llvm::Value *stringAddr;
     auto stringAddrBase = subIGF.Builder.CreatePtrToInt(cache, IGM.SizeTy);
     if (IGM.getModule()->getDataLayout().isBigEndian()) {
       stringAddrBase = subIGF.Builder.CreateAdd(stringAddrBase,
                                       llvm::ConstantInt::get(IGM.SizeTy, 4));
     }
-    stringAddr = subIGF.Builder.CreateAdd(stringAddrBase,
-                                              stringAddrOffset);
+    auto stringAddr = subIGF.Builder.CreateAdd(stringAddrBase,
+                                               stringAddrOffset);
     stringAddr = subIGF.Builder.CreateIntToPtr(stringAddr, IGM.Int8PtrTy);
 
     llvm::CallInst *call;