Remove unused imports.

Author: serhiy-storchaka

Tools/clinic/libclinic/converters.py

@@ -4,7 +4,7 @@
 from types import NoneType
 from typing import Any
 
-from libclinic import fail, NullType, unspecified, unknown, NULL, c_bytes_repr, c_str_repr, c_unichar_repr
+from libclinic import fail, NullType, unspecified, NULL, c_bytes_repr, c_unichar_repr
 from libclinic.function import (
     Function, Parameter,
     CALLABLE, STATIC_METHOD, CLASS_METHOD, METHOD_INIT, METHOD_NEW,

Tools/clinic/libclinic/dsl_parser.py

@@ -7,7 +7,7 @@
 import shlex
 import sys
 from collections.abc import Callable
-from types import FunctionType, NoneType
+from types import FunctionType
 from typing import TYPE_CHECKING, Any, NamedTuple
 
 import libclinic