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

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

src/_pytest/assertion/rewrite.py

@@ -18,7 +18,6 @@ import sys
 import tokenize
 import types
 from typing import Callable
-from typing import DefaultDict
 from typing import Dict
 from typing import IO
 from typing import Iterable

src/_pytest/python.py

@@ -1126,9 +1126,9 @@ def resolve_values_indices_in_parametersets(
                     argname_value_indices_for_hashable_ones[argname][value]
                 )
             except KeyError:  # New unique value
-                argname_value_indices_for_hashable_ones[argname][
-                    value
-                ] = argvalues_count[argname]
+                argname_value_indices_for_hashable_ones[argname][value] = (
+                    argvalues_count[argname]
+                )
                 argname_indices.append(argvalues_count[argname])
                 argvalues_count[argname] += 1
             except TypeError:  # `value` is not hashable