fixup! feat: add course authoring migration and rollback scripts

Author: dwong2708

openedx_authz/models/core.py

@@ -114,9 +114,6 @@ class Scope(BaseRegistryModel):
     class Meta:
         abstract = False
 
-    def __str__(self):
-        return f"Scope (namespace={self.NAMESPACE})"
-
 
 class Subject(BaseRegistryModel):
     """Model representing a subject in the authorization system.
@@ -135,9 +132,6 @@ class Subject(BaseRegistryModel):
     class Meta:
         abstract = False
 
-    def __str__(self):
-        return f"Subject (namespace={self.NAMESPACE})"
-
 
 class ExtendedCasbinRule(models.Model):
     """Extended model for Casbin rules to store additional metadata.
@@ -188,9 +182,6 @@ class Meta:
         verbose_name = "Extended Casbin Rule"
         verbose_name_plural = "Extended Casbin Rules"
 
-    def __str__(self):
-        return f"ExtendedCasbinRule for {self.casbin_rule}"
-
     @classmethod
     def create_based_on_policy(
         cls,