Remove pr-preview action

Author: jarrodmillman

.github/workflows/pr.yml

@@ -1,4 +1,4 @@
-name: PR Build Check & Preview
+name: PR Build Check
 
 on:
   pull_request:
@@ -25,18 +25,3 @@ jobs:
           cache: npm
 
       - run: make check
-
-      # continue-on-error because fork PRs don't have write access to push
-      # the preview to gh-pages. The build check above still validates the PR.
-      - uses: rossjrw/pr-preview-action@v1
-        continue-on-error: true
-        with:
-          source-dir: _build/html
-
-  cleanup:
-    if: github.event.action == 'closed'
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-
-      - uses: rossjrw/pr-preview-action@v1