remove unused bits

.gitignore

@@ -17,4 +17,4 @@ share/
 
 /requirements.txt
 /requirements-last-build.txt
-/charm_internal_version
+/charm_internal_version

src/charm.py

@@ -74,7 +74,7 @@
 )
 
 from config import Config
-from exceptions import AdminUserCreationError, MissingSecretError, NotConfigServerError
+from exceptions import AdminUserCreationError, MissingSecretError
 
 logger = logging.getLogger(__name__)
 
@@ -1561,17 +1561,6 @@ def is_relation_feasible(self, rel_interface: str) -> bool:
 
         return True
 
-    def is_cluster_on_same_revision(self) -> bool:
-        """Returns True if the cluster is using the same charm revision.
-
-        Note: This can only be determined by the config-server since shards are not integrated to
-        each other.
-        """
-        if not self.is_role(Config.Role.CONFIG_SERVER):
-            raise NotConfigServerError("This check can only be ran by the config-server.")
-
-        return self.version_checker.are_related_apps_valid()
-
     def is_sharding_component(self) -> bool:
         """Returns true if charm is running as a sharded component."""
         return self.is_role(Config.Role.SHARD) or self.is_role(Config.Role.CONFIG_SERVER)

src/exceptions.py

@@ -30,7 +30,3 @@ class MissingSecretError(MongoSecretError):
 
 class SecretAlreadyExistsError(MongoSecretError):
     """A secret that we want to create already exists."""
-
-
-class NotConfigServerError(Exception):
-    """Raised when an operation is performed on a component that is not a config server."""