Remove realpath check

This would only cause failure, but the run will fail anyway if we actually depend on it

Author: dylanhand

.github/workflows/docs.yml

@@ -22,10 +22,6 @@ jobs:
     steps:
       - uses: actions/checkout@v6
 
-      - name: Install realpath
-        run: |
-          which realpath
-
       - name: Setup Node.js for Slidev
         uses: actions/setup-node@v6
         with: