chore: remove deprecated/ directory and related workflow

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.github/workflows/deprecated.yml

@@ -1,78 +0,0 @@
-name: Deprecated
-
-on:
-  pull_request_target:
-    types: [opened, synchronize]
-
-permissions:
-  issues: write
-  contents: read
-  pull-requests: write
-
-jobs:
-  deprecated:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout PR
-        uses: actions/checkout@v4
-        with:
-          ref: ${{ github.event.pull_request.head.sha }}
-          fetch-depth: 0
-
-      - name: Get changed files
-        id: changed-files
-        uses: tj-actions/changed-files@v46
-        with:
-          files: |
-            apps/www/**
-          files_ignore: |
-            apps/www/public/r/**
-          base_sha: ${{ github.event.pull_request.base.sha }}
-          sha: ${{ github.event.pull_request.head.sha }}
-
-      - name: Comment on PR if www files changed
-        if: steps.changed-files.outputs.any_changed == 'true'
-        uses: actions/github-script@v7
-        with:
-          github-token: ${{ secrets.GITHUB_TOKEN }}
-          script: |
-            const changedFiles = `${{ steps.changed-files.outputs.all_changed_files }}`.split(' ');
-            const wwwFiles = changedFiles.filter(file =>
-              file.startsWith('apps/www/') &&
-              !file.startsWith('apps/www/public/r/') &&
-              file !== 'apps/www/package.json'
-            );
-
-            if (wwwFiles.length > 0) {
-              const comment = `Looks like this PR modifies files in \`apps/www\`, which is deprecated.
-
-              Consider applying the change to \`apps/v4\` if relevant.`;
-
-              await github.rest.issues.createComment({
-                owner: context.repo.owner,
-                repo: context.repo.repo,
-                issue_number: context.issue.number,
-                body: comment
-              });
-
-              // Add deprecated label
-              await github.rest.issues.addLabels({
-                owner: context.repo.owner,
-                repo: context.repo.repo,
-                issue_number: context.issue.number,
-                labels: ['deprecated']
-              });
-            } else {
-              // Remove deprecated label if no www files are changed
-              try {
-                await github.rest.issues.removeLabel({
-                  owner: context.repo.owner,
-                  repo: context.repo.repo,
-                  issue_number: context.issue.number,
-                  name: 'deprecated'
-                });
-              } catch (error) {
-                // Label doesn't exist, which is fine
-                console.log('Deprecated label not found, skipping removal');
-              }
-            }