docs: remove redundant plugins array from Bulk AI Flow documentation

Author: yaroslav8765

adminforth/documentation/docs/tutorial/07-Plugins/17-bulk-ai-flow.md

@@ -93,8 +93,6 @@ export const admin = new AdminForth({
   ],
   plugins: [
     ...
-  //diff-add
-    plugins: [
   //diff-add
       new UploadPlugin({
   //diff-add