refactor: apply the second aggregate pattern

Author: FrankX-xzh

app/location/__init__.py

@@ -3,15 +3,7 @@
 from ..utils import countries
 from ..utils.populations import country_population
 
-class Locations:
-    def __init__(self,locations: list[Location]):
-        self.locations = locations
 
-    def add_service(self,location):
-        self.locations.append(location)
-
-    def get_location(self):
-        return locations
 
 # pylint: disable=redefined-builtin,invalid-name
 class Location:  # pylint: disable=too-many-instance-attributes