Removing GitHub workflows from old release branch
diff --git a/.github/workflows/update-nightly.yml b/.github/workflows/update-nightly.yml
deleted file mode 100644
index 01b5147..0000000
--- a/.github/workflows/update-nightly.yml
+++ /dev/null
@@ -1,28 +0,0 @@
-# Copyright 2019 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.
-# ============================================================================
-
-on:
-  workflow_dispatch:  # Allow manual triggers
-  schedule:
-    - cron: 0 4 * * *  # 4am UTC is 9pm PDT and 8pm PST
-name: Set nightly branch to master HEAD
-jobs:
-  master-to-nightly:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: zofrex/mirror-branch@v1
-      name: Set nightly branch to master HEAD
-      with:
-        target-branch: 'nightly'