chore: remove cancel-workflow.yml since no use (#550)

Signed-off-by: yiyiyimu <wosoyoung@gmail.com>
diff --git a/.github/workflows/cancel-workflow.yml b/.github/workflows/cancel-workflow.yml
deleted file mode 100644
index c99b441..0000000
--- a/.github/workflows/cancel-workflow.yml
+++ /dev/null
@@ -1,42 +0,0 @@
-#
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements.  See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership.  The ASF licenses this file
-# to you 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.
-#
-name: Cancelling Duplicates
-on:
-  workflow_run:
-    workflows:
-      - 'e2e-test-ci'
-    types: ['requested']
-
-jobs:
-  cancel-duplicate-workflow-runs:
-    name: "Cancel duplicate workflow runs"
-    runs-on: ubuntu-latest
-    steps:
-      - name: "Checkout ${{ github.ref }} ( ${{ github.sha }} )"
-        uses: actions/checkout@v2.3.4
-        with:
-          submodules: recursive
-
-      - uses: ./.github/actions/cancel-workflow-runs
-        name: "Cancel duplicate workflow runs"
-        with:
-          cancelMode: allDuplicates
-          token: ${{ secrets.GITHUB_TOKEN }}
-          sourceRunId: ${{ github.event.workflow_run.id }}
-          skipEventTypes: '["push"]'