refactor(actions): remove duplicate Dependabot merge workflow

.github/workflows/auto-merge-dependencies.yml

@@ -1,95 +0,0 @@
-name: Auto-merge dependency updates
-
-on:
-  workflow_run:
-    workflows:
-      - CI
-    types:
-      - completed
-
-permissions:
-  contents: write
-  pull-requests: write
-
-jobs:
-  automerge:
-    if: >
-      github.event.workflow_run.conclusion == 'success' &&
-      github.event.workflow_run.event == 'pull_request'
-    runs-on: ubuntu-latest
-
-    steps:
-      - name: Auto-merge Dependabot dependency PRs
-        uses: actions/github-script@v9
-        with:
-          script: |
-            const pullRequests = context.payload.workflow_run.pull_requests || [];
-
-            if (pullRequests.length === 0) {
-              core.info('No pull requests were attached to this workflow run.');
-              return;
-            }
-
-            const { data: repo } = await github.rest.repos.get({
-              owner: context.repo.owner,
-              repo: context.repo.repo,
-            });
-
-            const mergeMethod =
-              repo.allow_merge_commit ? 'merge' :
-              repo.allow_squash_merge ? 'squash' :
-              repo.allow_rebase_merge ? 'rebase' :
-              null;
-
-            if (!mergeMethod) {
-              core.setFailed('This repository does not allow merge, squash, or rebase merges.');
-              return;
-            }
-
-            for (const prRef of pullRequests) {
-              const { data: pr } = await github.rest.pulls.get({
-                owner: context.repo.owner,
-                repo: context.repo.repo,
-                pull_number: prRef.number,
-              });
-
-              const author = pr.user?.login || '';
-              if (!author.includes('dependabot')) {
-                core.info(`#${pr.number} skipped: author is ${pr.user?.login}.`);
-                continue;
-              }
-
-              if (pr.draft) {
-                core.info(`#${pr.number} skipped: PR is a draft.`);
-                continue;
-              }
-
-              const labels = pr.labels.map((label) => label.name);
-              if (!labels.includes('dependencies')) {
-                core.info(`#${pr.number} skipped: missing dependencies label.`);
-                continue;
-              }
-
-              if (labels.includes('automerge:disabled')) {
-                core.info(`#${pr.number} skipped: automerge disabled by label.`);
-                continue;
-              }
-
-              const reviewDecision = pr.requested_reviewers?.length || pr.requested_teams?.length;
-              if (reviewDecision) {
-                core.info(`#${pr.number} skipped: PR is still waiting for requested review.`);
-                continue;
-              }
-
-              try {
-                await github.rest.pulls.merge({
-                  owner: context.repo.owner,
-                  repo: context.repo.repo,
-                  pull_number: pr.number,
-                  merge_method: mergeMethod,
-                });
-                core.info(`#${pr.number} merged successfully with '${mergeMethod}'.`);
-              } catch (error) {
-                core.warning(`#${pr.number} was not merged automatically: ${error.message}`);
-              }
-            }