Remove unnecessary plugin activation overload

src/poetry_plugin_shell/plugins.py

@@ -8,19 +8,10 @@
 
 
 if TYPE_CHECKING:
-    from poetry.console.application import Application
     from poetry.console.commands.command import Command
 
 
 class ShellApplicationPlugin(ApplicationPlugin):
     @property
     def commands(self) -> list[type[Command]]:
         return [ShellCommand]
-
-    def activate(self, application: Application) -> None:
-        # Removing the existing shell command to avoid an error
-        # If you're checking this code out to get inspiration
-        # for your own plugins: DON'T DO THIS!
-        if application.command_loader.has("shell"):
-            del application.command_loader._factories["shell"]
-        super().activate(application=application)