Move test_successful_target into TestGenerateInstance

test_successful_target was the only method left in
TestTargetStatusNotSuccess, contradicting the class name. It fits
naturally with the other generation tests in TestGenerateInstance.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: adamtheturtle

tests/mock_vws/test_vumark_generation_api.py

@@ -261,13 +261,6 @@ def test_non_vumark_database(
             == ResultCodes.INVALID_TARGET_TYPE.value
         )
 
-
-@pytest.mark.usefixtures("verify_mock_vuforia")
-class TestTargetStatusNotSuccess:
-    """Tests for VuMark generation when the target is not in success
-    state.
-    """
-
     @staticmethod
     def test_successful_target(
         vumark_vuforia_database: VuMarkCloudDatabase,