Fix: Remove duplicate test for '22.6'

Author: wiegandm

tests/protocols/gmp/test_context_manager.py

@@ -121,15 +121,6 @@ def test_select_gmpv226(self):
             b"</get_version_response>"
         )
 
-        with self.gmp as gmp:
-            self.assertEqual(gmp.get_protocol_version(), (22, 6))
-            self.assertIsInstance(gmp, GMPv226)
-        self.connection.read.return_value(
-            b'<get_version_response status="200" status_text="OK">'
-            b"<version>22.6</version>"
-            b"</get_version_response>"
-        )
-
         with self.gmp as gmp:
             self.assertEqual(gmp.get_protocol_version(), (22, 6))
             self.assertIsInstance(gmp, GMPv226)