Tighten up the inline script in the test a bit

Author: stestagg

Lib/test/test_array.py

@@ -49,8 +49,6 @@ def test_module_init_mutablesequence_register_failure(self):
                 import array
             except AttributeError:
                 pass
-            else:
-                raise SystemExit("import array should have failed")
         """)
         assert_python_ok("-c", script)