BE: linting fixes 3

Signed-off-by: jokob-sk <jokob.sk@gmail.com>

server/api_server/devices_endpoint.py

@@ -96,7 +96,7 @@ def delete_unknown_devices():
 
 def export_devices(export_format):
     """
-    Export devices from the Devices table in teh desired format.
+    Export devices from the Devices table in the desired format.
     - If `macs` is None → delete ALL devices.
     - If `macs` is a list → delete only matching MACs (supports wildcard '*').
     """

server/api_server/graphql_endpoint.py

@@ -364,7 +364,6 @@ class Query(ObjectType):
         Collect language strings, optionally filtered by language code and/or string key.
         Caches in memory for performance. Can fallback to 'en_us' if a string is missing.
         """
-        global _langstrings_cache, _langstrings_cache_mtime
 
         langStrings = []