Update source file en.json

Author: ecampbot

frontend/src/locales/en.json

@@ -181,8 +181,6 @@
         "category": "Activity categories",
         "checklistItemCount": "No entries | One entry | {count} entries",
         "checklists": "Checklists",
-        "clearClipboard": "Clear clipboard",
-        "clipboard": "Clipboard",
         "clipboardInfoDialog": {
           "allow": "Allow now",
           "denied": "You have denied access to your clipboard. Therefore, you have to enter the link to the template camp manually.",