[llvm][RelLookupTableConverter] Remove no-op ptr-to-ptr bitcast (NFC)

Opaque ptr cleanup effort (NFC).

Author: JOE1994

llvm/lib/Transforms/Utils/RelLookupTableConverter.cpp

@@ -153,11 +153,10 @@ static void convertToRelLookupTable(GlobalVariable &LookupTable) {
   Builder.SetInsertPoint(Load);
   Function *LoadRelIntrinsic = llvm::Intrinsic::getDeclaration(
       &M, Intrinsic::load_relative, {Index->getType()});
-  Value *Base = Builder.CreateBitCast(RelLookupTable, Builder.getInt8PtrTy());
 
   // Create a call to load.relative intrinsic that computes the target address
   // by adding base address (lookup table address) and relative offset.
-  Value *Result = Builder.CreateCall(LoadRelIntrinsic, {Base, Offset},
+  Value *Result = Builder.CreateCall(LoadRelIntrinsic, {RelLookupTable, Offset},
                                      "reltable.intrinsic");
 
   // Create a bitcast instruction if necessary.