Update build.yml

Author: LiamConnors

.github/workflows/build.yml

@@ -52,6 +52,7 @@ jobs:
           md5sum all_static/css/main.css | cut -d ' ' -f 1 > _data/cache_bust_css.yml
           bundle exec jekyll build
           cp python/sitemap.xml _site/python/sitemap.xml
+          rm _data/mapbox_token.yml
 
       - name: Create Percy snapshots
         run: |