Add unset_cookies method to import in __init__

Author: vimalloc

flask_jwt_extended/__init__.py

@@ -1,6 +1,7 @@
 from .jwt_manager import JWTManager
 from .utils import (jwt_required, fresh_jwt_required, jwt_refresh_token_required,
                     create_refresh_token, create_access_token, get_jwt_identity,
-                    get_jwt_claims, set_access_cookies, set_refresh_cookies)
+                    get_jwt_claims, set_access_cookies, set_refresh_cookies,
+                    unset_jwt_cookies)
 from .blacklist import (revoke_token, unrevoke_token, get_stored_tokens,
                         get_all_stored_tokens, get_stored_token)