Core: Fix errors found by LGTM

volatility/cli/volshell/generic.py

@@ -279,7 +279,7 @@ class Volshell(interfaces.plugins.PluginInterface):
             self.config[path_join(plugin_config_suffix, plugin.__name__, name)] = value
 
         try:
-            constructed = plugins.construct_plugin(self.context, [], plugin, plugin_path, None, NullFileHandler())
+            constructed = plugins.construct_plugin(self.context, [], plugin, plugin_path, None, NullFileHandler)
             return constructed.run()
         except exceptions.UnsatisfiedException as excp:
             print("Unable to validate the plugin requirements: {}\n".format([x for x in excp.unsatisfied]))

volatility/framework/interfaces/layers.py

@@ -231,7 +231,6 @@ class DataLayerInterface(interfaces.configuration.ConfigurableInterface, metacla
         if progress_callback is not None and not callable(progress_callback):
             raise TypeError("Progress_callback is not callable")
 
-        scanner = scanner
         scanner.context = context
         scanner.layer_name = self.name