[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

mypy/errors.py

@@ -15,7 +15,6 @@
 from mypy.nodes import Context
 from mypy.options import Options
 from mypy.scope import Scope
-from mypy.typeops import make_simplified_union
 from mypy.types import Type
 from mypy.util import DEFAULT_SOURCE_OFFSET, is_typeshed_file
 from mypy.version import __version__ as mypy_version