[parser] ci: remove github action on pull request (#1341)

parser/.github/workflows/itcase.yml

@@ -1,38 +0,0 @@
-name: Integration Test
-
-on:
-  push:
-    branches:
-      - master
-      - release-5.0
-      - release-4.0
-      - release-3.0
-  pull_request:
-    branches:
-      - master
-      - release-5.0
-      - release-4.0
-      - release-3.0
-
-jobs:
-  test:
-    # TODO: skip for now as resource limitation
-    if: false
-    runs-on: ubuntu-latest
-    steps:
-      - name: checkout
-        uses: actions/checkout@v2
-        with:
-          path: parser
-      - name: setup go
-        uses: actions/setup-go@v2
-        with:
-          go-version: 1.16
-      - name: test
-        run: |
-          git clone https://github.com/pingcap/tidb.git
-          cd tidb
-          rm go.sum
-          GO111MODULE=on go mod edit -replace github.com/pingcap/parser=$GITHUB_WORKSPACE/parser
-          go mod tidy
-          make gotest

parser/.github/workflows/unittest.yml

@@ -1,58 +0,0 @@
-name: Unit Test
-on:
-  push:
-    branches:
-      - master
-      - release-5.0
-      - release-4.0
-      - release-3.0
-  pull_request:
-    branches:
-      - master
-      - release-5.0
-      - release-4.0
-      - release-3.0
-
-jobs:
-  generated:
-    runs-on: ubuntu-latest
-    steps:
-      - name: checkout
-        uses: actions/checkout@v2
-      - name: setup go
-        uses: actions/setup-go@v2
-        with:
-          go-version: 1.16
-      - name: validation
-        run: |
-          mv parser.go parser.go.committed
-          make parser
-          diff -u parser.go.committed parser.go
-
-  format:
-    runs-on: ubuntu-latest
-    steps:
-      - name: checkout
-        uses: actions/checkout@v2
-      - name: setup go
-        uses: actions/setup-go@v2
-        with:
-          go-version: 1.16
-      - name: format
-        run: make fmt
-
-  test:
-    runs-on: ubuntu-latest
-    steps:
-      - name: checkout
-        uses: actions/checkout@v2
-        with:
-          fetch-depth: 0
-      - name: setup go
-        uses: actions/setup-go@v2
-        with:
-          go-version: 1.16
-      - name: test
-        run: make test
-      - name: codecov
-        uses: codecov/codecov-action@v1