test(vipw): Drop exception for macos

vipw seems to have -d as an option on macos now.
Partially reverts ccf7bf6 "test(dmesg,vipw): expect no options on macOS"

Author: yedayak

test/t/test_vipw.py

@@ -1,12 +1,7 @@
-import sys
-
 import pytest
 
 
 class TestVipw:
     @pytest.mark.complete("vipw -", require_cmd=True)
     def test_1(self, completion):
-        if sys.platform == "darwin":
-            assert not completion  # takes no options
-        else:
-            assert completion
+        assert completion