dimensiondata: fix broken import (#35634)

* Fix broken import

* Remove never reached statements

exit_json and fail_json methods call sys.exit, subsequent statements
can not be executed.

lib/ansible/module_utils/dimensiondata.py

@@ -71,8 +71,6 @@ class DimensionDataModule(object):
         if not HAS_LIBCLOUD:
             self.module.fail_json(msg='libcloud is required for this module.')
 
-            return
-
         # Credentials are common to all Dimension Data modules.
         credentials = self.get_credentials()
         self.user_id = credentials['user_id']
@@ -125,8 +123,6 @@ class DimensionDataModule(object):
         if not HAS_LIBCLOUD:
             self.module.fail_json(msg='libcloud is required for this module.')
 
-            return None
-
         user_id = None
         key = None
 
@@ -137,8 +133,6 @@ class DimensionDataModule(object):
                     msg='"mcp_user" parameter was specified, but not "mcp_password" (either both must be specified, or neither).'
                 )
 
-                return None
-
             user_id = self.module.params['mcp_user']
             key = self.module.params['mcp_password']