Revert "Add version control system functionality with branch management, history tracking, and merge operations"

This reverts commit f3d28817a5.

location/mixins.py

@@ -1,43 +0,0 @@
-from django.contrib.contenttypes.models import ContentType
-from django.db.models import QuerySet
-from typing import Optional, Tuple
-
-class LocationMixin:
-    """Mixin for models that can have location data attached."""
-
-    def get_location(self) -> Optional['Location']:
-        """Get location for this instance."""
-        from location.models import Location
-        ct = ContentType.objects.get_for_model(self.__class__)
-        return Location.objects.filter(content_type=ct, object_id=self.pk).first()
-
-    def set_location(self, address: str, latitude: float, longitude: float) -> 'Location':
-        """Set or update location for this instance."""
-        from location.models import Location
-        ct = ContentType.objects.get_for_model(self.__class__)
-        location, created = Location.objects.update_or_create(
-            content_type=ct,
-            object_id=self.pk,
-            defaults={
-                'address': address,
-                'latitude': latitude,
-                'longitude': longitude
-            }
-        )
-        return location
-
-    @property
-    def coordinates(self) -> Optional[Tuple[float, float]]:
-        """Get coordinates (latitude, longitude) if available."""
-        location = self.get_location()
-        if location:
-            return location.latitude, location.longitude
-        return None
-
-    @property
-    def formatted_location(self) -> str:
-        """Get formatted address string if available."""
-        location = self.get_location()
-        if location:
-            return location.get_formatted_address()
-        return ""