remove unused imports, vairables and commented code

from views, and base cookbook and recipes modules

cookbook/views/api.py

@@ -1490,7 +1490,6 @@ class ImportOpenData(APIView):
         # TODO validate data
         print(request.data)
         selected_version = request.data['selected_version']
-        selected_datatypes = request.data['selected_datatypes']
         update_existing = str2bool(request.data['update_existing'])
         use_metric = str2bool(request.data['use_metric'])