Revert "Run migration script for GitHub Actions (#8305)" (#8307)

This reverts commit 683b2c66.

.github/main.workflow

+workflow "Generate pull request stats" {
+  on = "pull_request"
+  resolves = ["PR Stats"]
+}
+
+workflow "Generate release stats" {
+  on = "release"
+  resolves = ["PR Stats"]
+}
+
+action "PR Stats" {
+  uses = "zeit/next-stats-action@master"
+  secrets = ["GITHUB_TOKEN", "PR_STATS_TEMP_TOKEN"]
+}

.github/workflows/pull_request.yml

-on: pull_request
-name: Generate pull request stats
-jobs:
-  pRStats:
-    name: PR Stats
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@master
-    - name: PR Stats
-      uses: zeit/next-stats-action@master
-      with:
-        PR_STATS_TEMP_TOKEN: ${{ secrets.PR_STATS_TEMP_TOKEN }}
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        PR_STATS_TEMP_TOKEN: ${{ secrets.PR_STATS_TEMP_TOKEN }}

.github/workflows/release.yml

-on: release
-name: Generate release stats
-jobs:
-  pRStats:
-    name: PR Stats
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@master
-    - name: PR Stats
-      uses: zeit/next-stats-action@master
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        PR_STATS_TEMP_TOKEN: ${{ secrets.PR_STATS_TEMP_TOKEN }}