Remove redundant pt2_mode=True (#896)

Summary:
Pull Request resolved: facebookincubator/AITemplate#896

X-link: pytorch/executorch#54

Title

Reviewed By: gmagogsfm

Differential Revision: D48181683

fbshipit-source-id: ace179828f590d22995ae60c513d11f1771e9053

Author: tugsbayasgalan

fx2ait/fx2ait/tools/common_aten2ait.py

@@ -107,7 +107,6 @@ def generate_graph(
                 mod,
                 tuple(original_inputs),
                 CaptureConfig(
-                    pt2_mode=True,
                     enable_functionalization=False,
                     enable_dynamic_shape=True,
                     _use_old_decomp_table=True,