Revert "CI: automatically create PR to bump submodules (#30523)"

This reverts commit e653b285251e45740bfde63fb798d33c3627ae41.

old-commit-hash: e0ab068273

.github/workflows/repo-maintenance.yaml

@@ -2,36 +2,12 @@ name: repo maintenance
 
 on:
   schedule:
-    - cron: "0 15 * * *"
+    - cron: "0 15 * * 2"
   workflow_dispatch:
 
 jobs:
-  bump_submodules:
-    name: bump_submodules
-    runs-on: ubuntu-20.04
-    container:
-      image: ghcr.io/commaai/openpilot-base:latest
-    steps:
-    - uses: actions/checkout@v4
-      with:
-        submodules: true
-    - name: bump submodules
-      run: |
-        git config --global --add safe.directory '*'
-        git -c submodule."tinygrad".update=none submodule update --remote
-        git add .
-    - name: Create Pull Request
-      uses: peter-evans/create-pull-request@5b4a9f6a9e2af26e5f02351490b90d01eb8ec1e5
-      with:
-        token: ${{ secrets.ACTIONS_CREATE_PR_PAT }}
-        commit-message: bump submodules
-        title: 'Bump submodules'
-        branch: auto-bump-submodules
-        base: master
-        delete-branch: true
-        body: 'Automatic PR from repo-maintenance -> bump_submodules'
-  package_updates:
-    name: package_updates
+  updates:
+    name: updates
     runs-on: ubuntu-20.04
     container:
       image: ghcr.io/commaai/openpilot-base:latest
@@ -54,4 +30,3 @@ jobs:
         branch: auto-package-updates
         base: master
         delete-branch: true
-        body: 'Automatic PR from repo-maintenance -> package_updates'