fit: no use of updating two libraries

lib/charms/mongodb/v0/upgrade_helpers.py

@@ -14,7 +14,6 @@
 
 import poetry.core.constraints.version as poetry_version
 from charms.mongodb.v0.mongo import MongoConfiguration
-from charms.mongodb.v1.helpers import unit_number
 from charms.mongodb.v1.mongodb import FailedToMovePrimaryError, MongoDBConnection
 from charms.mongodb.v1.mongos import MongosConnection
 from ops import ActionEvent, BlockedStatus, MaintenanceStatus, StatusBase, Unit
@@ -47,6 +46,15 @@
 PRECHECK_ACTION_NAME = "pre-upgrade-check"
 
 
+# BEGIN: Helper functions
+def unit_number(unit_: Unit) -> int:
+    """Get unit number."""
+    return int(unit_.name.split("/")[-1])
+
+
+# END: Helper functions
+
+
 # BEGIN: Exceptions
 class StatusException(Exception):
     """Exception with ops status."""

lib/charms/mongodb/v1/helpers.py

@@ -11,7 +11,6 @@
 from typing import List, Mapping
 
 from charms.mongodb.v1.mongodb import MongoConfiguration
-from ops import Unit
 from ops.model import ActiveStatus, MaintenanceStatus, StatusBase, WaitingStatus
 
 from config import Config
@@ -24,7 +23,7 @@
 
 # Increment this PATCH version before using `charmcraft publish-lib` or reset
 # to 0 if you are raising the major API version
-LIBPATCH = 11
+LIBPATCH = 10
 
 # path to store mongodb ketFile
 KEY_FILE = "keyFile"
@@ -343,8 +342,3 @@ def safe_exec(
     except subprocess.CalledProcessError as err:
         logger.error(f"cmd failed - {err.cmd}, {err.stdout}, {err.stderr}")
         raise
-
-
-def unit_number(unit_: Unit) -> int:
-    """Get unit number."""
-    return int(unit_.name.split("/")[-1])