unused translations removed

Author: Attila Cseh

invokeai/frontend/web/public/locales/en.json

@@ -290,7 +290,6 @@
         "workflows": "Workflows",
         "other": "Other",
         "gallery": "Gallery",
-        "batchFieldValues": "Batch Field Values",
         "item": "Item",
         "session": "Session",
         "notReady": "Unable to Queue",