Update djangocms_alias/cms_plugins.py

Co-authored-by: sourcery-ai[bot] <58596630+sourcery-ai[bot]@users.noreply.github.com>

Author: fsbraun

djangocms_alias/cms_plugins.py

@@ -152,8 +152,9 @@ def detach_alias_plugin(cls, plugin, language):
         plugin_position = plugin.position
         target_placeholder.delete_plugin(plugin)
         if source_plugins:
-            target_last_plugin = target_placeholder.get_last_plugin(plugin.language)
-            if target_last_plugin:
+            if target_last_plugin := target_placeholder.get_last_plugin(
+                plugin.language
+            ):
                 target_placeholder._shift_plugin_positions(
                     language,
                     start=plugin_position,