Don't fold constants in affine_apply.fold.

This sometimes (rarely) fails with "folder reused existing op
for one result but constant materialization failed for another
result". Not sure why, but it's just a not very important
runtime optimization
anyway.

PiperOrigin-RevId: 636530184

third_party/xla/xla/service/gpu/fusions/mlir/ir/xla_gpu_ops.cc

@@ -641,8 +641,6 @@ mlir::LogicalResult ApplyIndexingOp::fold(
       results.push_back(getOperand(dim.getPosition()));
     } else if (auto sym = mlir::dyn_cast<mlir::AffineSymbolExpr>(expr)) {
       results.push_back(getOperand(map.getNumDims() + sym.getPosition()));
-    } else if (auto cst = mlir::dyn_cast<mlir::AffineConstantExpr>(expr)) {
-      results.push_back(OpBuilder(getContext()).getIndexAttr(cst.getValue()));
     } else {
       results.clear();
       return failure();