ci: don't run markdown tests in type tests

.github/workflows/ci.yml

@@ -70,8 +70,6 @@ jobs:
         run: npm install --global npm@7
       - name: Install dependencies
         run: npm ci
-      - name: Run type tests
-        run: npm run lint:markdown
         # Need to do a bunch of work to generate the locale typings 🙃
       - name: Prepare type declarations
         run: |