chore: remove upstream CI workflows (mirror inertization per internal#233)

.github/workflows/ci.yml

@@ -1,19 +0,0 @@
-on:
-  push: {branches: master}
-  pull_request: {branches: master}
-
-jobs:
-  ci:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-node@v1
-        with: {node-version: 13.x}
-      - uses: actions/cache@v1
-        with:
-          path: ~/.npm
-          key: ${{runner.os}}-npm-${{hashFiles('**/package-lock.json')}}
-          restore-keys: ${{runner.os}}-npm-
-      - run: npm ci
-      - run: npm run style:check
-      - run: npm test

.github/workflows/integration.yml

@@ -1,17 +0,0 @@
-on:
-  push: {branches: master}
-
-jobs:
-  integration:
-    runs-on: ubuntu-latest
-    steps:
-      - id: output-set
-        uses: actions/github-script@master
-        with:
-          script: return core.getInput('input-value')
-          result-encoding: string
-          input-value: output
-      - run: |
-          if [[ "${{steps.output-set.outputs.result}}" != "output" ]]; then
-            exit 1
-          fi

.github/workflows/pull-request-test.yml

@@ -1,39 +0,0 @@
-on:
-  pull_request:
-    branches: master
-    types: [opened, synchronize]
-
-jobs:
-  pull-request-test:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2
-      - uses: ./
-        with:
-          script: |
-            // Get the existing comments.
-            const {data: comments} = await github.issues.listComments({
-              owner: context.repo.owner,
-              repo: context.repo.repo,
-              issue_number: context.payload.number,
-            })
-
-            // Find any comment already made by the bot.
-            const botComment = comments.find(comment => comment.user.id === 41898282)
-            const commentBody = "Hello from actions/github-script! (${{ github.sha }})"
-
-            if (botComment) {
-              await github.issues.updateComment({
-                owner: context.repo.owner,
-                repo: context.repo.repo,
-                comment_id: botComment.id,
-                body: commentBody
-              })
-            } else {
-              await github.issues.createComment({
-                owner: context.repo.owner,
-                repo: context.repo.repo,
-                issue_number: context.payload.number,
-                body: commentBody
-              })
-            }