Remove file.publisher_url which is no longer used.

Author: DarkaMaul

warehouse/packaging/models.py

@@ -842,23 +842,6 @@ def __table_args__(cls):  # noqa
         passive_deletes=True,
     )
 
-    @property
-    def publisher_url(self) -> str | None:
-        event_tag = self.Event.tag  # type: ignore[attr-defined]
-        event_additional = self.Event.additional  # type: ignore[attr-defined]
-
-        try:
-            release_event = self.events.where(
-                sql.and_(
-                    event_tag == EventTag.File.FileAdd,
-                    event_additional["publisher_url"].as_string().is_not(None),
-                )
-            ).one()
-        except (NoResultFound, MultipleResultsFound):
-            return None
-
-        return release_event.additional["publisher_url"]
-
     @property
     def uploaded_via_trusted_publisher(self) -> bool:
         """Return True if the file was uploaded via a trusted publisher."""