Apply fix from PR #2315: delete resource from resource table when removing from pool

gns3server/db/repositories/pools.py

@@ -203,6 +203,9 @@ class ResourcePoolsRepository(BaseRepository):
         resource_pool_db.resources.remove(resource)
         await self._db_session.commit()
         await self._db_session.refresh(resource_pool_db)
+
+        await self.delete_resource(resource.resource_id)
+
         return resource_pool_db
 
     async def get_pool_resources(self, resource_pool_id: UUID) -> List[models.Resource]: