delete layout_free_buffers

Author: HongHongHongL

tests/python/relax/test_transform_split_layout_rewrite_preproc.py

@@ -66,7 +66,6 @@ def tir_func_prepacked(
             W_rewrite: T.Buffer((4, 4, 56, 56), "float32"),
             Out: T.Buffer((224, 224), "float32"),
         ):
-            T.func_attr({"layout_free_buffers": [1]})
             for i0, j0, i1, j1 in T.grid(4, 4, 56, 56):
                 with T.block("Out"):
                     vi = T.axis.spatial(224, i0 * 56 + i1)
@@ -78,7 +77,6 @@ def tir_func_weight_prepack(
             W: T.Buffer((224, 224), "float32"),
             W_rewrite: T.Buffer((4, 4, 56, 56), "float32"),
         ):
-            T.func_attr({"layout_free_buffers": [1]})
             for i, j in T.grid(224, 224):
                 with T.block("W_rewrite"):
                     vi, vj = T.axis.remap("SS", [i, j])