fixup typing + imports

src/_pytest/python/metafunc.py

@@ -12,10 +12,9 @@ from typing import Mapping
 from typing import Optional
 from typing import Pattern
 from typing import Sequence
+from typing import TYPE_CHECKING
 from typing import Union
 
-from typing_extensions import Literal
-
 from _pytest import fixtures
 from _pytest import python
 from _pytest._io.saferepr import saferepr
@@ -32,9 +31,12 @@ from _pytest.mark import MarkDecorator
 from _pytest.mark import ParameterSet
 from _pytest.mark.structures import normalize_mark_list
 from _pytest.outcomes import fail
-from _pytest.scope import _ScopeName
 from _pytest.scope import Scope
 
+if TYPE_CHECKING:
+    from _pytest.scope import _ScopeName
+    from typing_extensions import Literal
+
 
 @final
 @dataclasses.dataclass(frozen=True)