Remove flatten transform flag

Author: adam-smnk

mlir/include/mlir/Dialect/Linalg/TransformOps/LinalgTransformOps.td

@@ -2435,7 +2435,6 @@ def VectorizeOp : Op<Transform_Dialect, "structured.vectorize",
                        DefaultValuedOptionalAttr<DenseI64ArrayAttr, "{}">:
                           $static_vector_sizes,
                        OptionalAttr<UnitAttr>:$vectorize_nd_extract,
-                       OptionalAttr<UnitAttr>:$flatten1D_depthwise_conv,
                        OptionalAttr<UnitAttr>:$create_named_contraction,
                        DefaultValuedOptionalAttr<DenseBoolArrayAttr, "{}">:
                           $scalable_sizes);

mlir/lib/Dialect/Linalg/TransformOps/LinalgTransformOps.cpp

@@ -3921,7 +3921,7 @@ DiagnosedSilenceableFailure transform::VectorizeOp::apply(
     FailureOr<VectorizationResult> vectorResults =
         linalg::vectorize(rewriter, target, vectorSizes, getScalableSizes(),
                           getVectorizeNdExtract().value_or(false),
-                          getFlatten1DDepthwiseConv().value_or(false),
+                          /*flatten1DDepthwiseConv=*/false,
                           getCreateNamedContraction().value_or(false));
     if (failed(vectorResults)) {
       return mlir::emitSilenceableFailure(target->getLoc())