[CoroElide] Remove unnecessary bitcast (NFCI)

No longer needed with opaque pointers.

Author: nikic

llvm/lib/Transforms/Coroutines/CoroElide.cpp

@@ -81,22 +81,6 @@ class CoroIdElider {
 // provided constant.
 static void replaceWithConstant(Constant *Value,
                                 SmallVectorImpl<CoroSubFnInst *> &Users) {
-  if (Users.empty())
-    return;
-
-  // See if we need to bitcast the constant to match the type of the intrinsic
-  // being replaced. Note: All coro.subfn.addr intrinsics return the same type,
-  // so we only need to examine the type of the first one in the list.
-  Type *IntrTy = Users.front()->getType();
-  Type *ValueTy = Value->getType();
-  if (ValueTy != IntrTy) {
-    // May need to tweak the function type to match the type expected at the
-    // use site.
-    assert(ValueTy->isPointerTy() && IntrTy->isPointerTy());
-    Value = ConstantExpr::getBitCast(Value, IntrTy);
-  }
-
-  // Now the value type matches the type of the intrinsic. Replace them all!
   for (CoroSubFnInst *I : Users)
     replaceAndRecursivelySimplify(I, Value);
 }