Add autoflake to pre-commit configuration (#9666)

src/_pytest/python.py

@@ -905,8 +905,6 @@ class InstanceDummy:
     only to ignore it; this dummy class keeps them working. This will be removed
     in pytest 8."""
 
-    pass
-
 
 def __getattr__(name: str) -> object:
     if name == "Instance":

src/_pytest/python_api.py

@@ -131,7 +131,6 @@ class ApproxBase:
         # a numeric type.  For this reason, the default is to do nothing.  The
         # classes that deal with sequences should reimplement this method to
         # raise if there are any non-numeric elements in the sequence.
-        pass
 
 
 def _recursive_list_map(f, x):