Remove unused imports

Author: guerler

test/unit/app/visualizations/plugins/test_VisualizationPlugin.py

@@ -3,17 +3,11 @@
 """
 
 from galaxy.app_unittest_utils import galaxy_mock
-from galaxy.util import clean_multiline_string
-from galaxy.visualization.plugins import (
-    plugin as vis_plugin,
-    resource_parser,
-    utils as vis_utils,
-)
+from galaxy.visualization.plugins.plugin import VisualizationPlugin
 from . import VisualizationsBase_TestCase
 
 
 class TestVisualizationsPlugin(VisualizationsBase_TestCase):
-    plugin_class = vis_plugin.VisualizationPlugin
 
     def test_default_init(self):
         """
@@ -25,7 +19,7 @@ def test_default_init(self):
                 "static": {},
             }
         )
-        plugin = self.plugin_class(vis_dir.root_path, "myvis", {})
+        plugin = VisualizationPlugin(vis_dir.root_path, "myvis", {})
         assert plugin.name == "myvis"
         assert plugin.path == vis_dir.root_path
         assert plugin.config == {}