+ filter out Struct signature test

Author: skirpichev

Lib/test/test_inspect/test_inspect.py

@@ -6268,7 +6268,8 @@ def test_stat_module_has_signatures(self):
 
     def test_struct_module_has_signatures(self):
         import struct
-        self._test_module_has_signatures(struct)
+        unsupported_signature = {'Struct'}
+        self._test_module_has_signatures(struct, unsupported_signature=unsupported_signature)
 
     def test_string_module_has_signatures(self):
         import string