diff --git a/.github/workflows/dispatch-push-event.yaml b/.github/workflows/dispatch-push-event.yaml
deleted file mode 100644
index 492083c8038f6..0000000000000
--- a/.github/workflows/dispatch-push-event.yaml
+++ /dev/null
@@ -1,45 +0,0 @@
-name: dispatch-push-event
-on:
-  push:
-
-jobs:
-  search-dispatch-repo:
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        include:
-          - { version: beta/v0.3.**, dispatch-repo: pilot-auto.x1.eve }
-    outputs:
-      dispatch-repo: ${{ steps.search-dispatch-repo.outputs.value }}
-    steps:
-      - name: Search dispatch repo
-        id: search-dispatch-repo
-        run: |
-          if [[ ${{ github.ref_name }} =~ ${{ matrix.version }} ]]; then
-            echo ::set-output name=value::"${{ matrix.dispatch-repo }}"
-            echo "Detected beta branch: ${{ github.ref_name }}"
-            echo "Dispatch repository: ${{ matrix.dispatch-repo }}"
-          fi
-
-  dispatch-push-event:
-    runs-on: ubuntu-latest
-    needs: search-dispatch-repo
-    if: ${{ needs.search-dispatch-repo.outputs.dispatch-repo != '' }}
-    steps:
-      - name: Generate token
-        id: generate-token
-        uses: tibdex/github-app-token@v1
-        with:
-          app_id: ${{ secrets.INTERNAL_APP_ID }}
-          private_key: ${{ secrets.INTERNAL_PRIVATE_KEY }}
-
-      # 注意: workflow_dispatchで指定するブランチはmain固定となっているため、dispatch-repoのmainブランチにupdate-beta-branch.yamlが存在することが前提条件。
-      - name: Dispatch the update-beta-branch workflow
-        run: |
-          curl -L \
-          -X POST \
-          -H "Accept: application/vnd.github+json" \
-          -H "Authorization: Bearer ${{ steps.generate-token.outputs.token }}" \
-          -H "X-GitHub-Api-Version: 2022-11-28" \
-          https://api.github.com/repos/tier4/${{ needs.search-dispatch-repo.outputs.dispatch-repo }}/actions/workflows/update-beta-branch.yaml/dispatches \
-          -d '{"ref":"main"}'