remove old file

official/vision/beta/projects/panoptic_maskrcnn/common/registry_imports.py

-# Copyright 2021 The TensorFlow Authors. All Rights Reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-"""Imports to configure Panoptic Mask R-CNN"""
-
-# pylint: disable=unused-import
-from official.vision.beta.projects.panoptic_maskrcnn.configs import panoptic_maskrcnn
-from official.vision.beta.projects.panoptic_maskrcnn.tasks import panoptic_maskrcnn