Remove import

Author: armenzg

src/sentry/deletions/defaults/__init__.py

@@ -11,7 +11,6 @@
 from .file import *  # noqa: F401,F403
 from .group import *  # noqa: F401,F403
 from .grouphash import *  # noqa: F401,F403
-from .grouphistory import *  # noqa: F401,F403
 from .incident import *  # noqa: F401,F403
 from .monitor import *  # noqa: F401,F403
 from .monitor_environment import *  # noqa: F401,F403