Fix docs deploy: remove broken curl step

The grammar file is already handled by npm postinstall which copies
from djot-grammars. The curl step was pointing to non-existent
djot-intellij repo.

Author: dereuromark

.github/workflows/deploy-docs.yml

@@ -37,12 +37,6 @@ jobs:
       - name: Setup Pages
         uses: actions/configure-pages@v5
 
-      - name: Fetch latest Djot grammar
-        run: |
-          mkdir -p docs/.vitepress/grammars
-          curl -fsSL -o docs/.vitepress/grammars/djot.tmLanguage.json \
-            https://raw.githubusercontent.com/php-collective/djot-intellij/main/src/main/resources/textmate/djot.tmLanguage.json
-
       - name: Install dependencies
         run: npm ci
         working-directory: docs