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

Opaque ptr cleanup effort

Author: JOE1994

llvm/lib/Frontend/OpenMP/OMPIRBuilder.cpp

@@ -5580,14 +5580,11 @@ OpenMPIRBuilder::createAtomicWrite(const LocationDescription &Loc,
     XSt->setAtomic(AO);
   } else {
     // We need to bitcast and perform atomic op as integers
-    unsigned Addrspace = cast<PointerType>(XTy)->getAddressSpace();
     IntegerType *IntCastTy =
         IntegerType::get(M.getContext(), XElemTy->getScalarSizeInBits());
-    Value *XBCast = Builder.CreateBitCast(
-        X.Var, IntCastTy->getPointerTo(Addrspace), "atomic.dst.int.cast");
     Value *ExprCast =
         Builder.CreateBitCast(Expr, IntCastTy, "atomic.src.int.cast");
-    StoreInst *XSt = Builder.CreateStore(ExprCast, XBCast, X.IsVolatile);
+    StoreInst *XSt = Builder.CreateStore(ExprCast, X.Var, X.IsVolatile);
     XSt->setAtomic(AO);
   }