[client] fix settings fragment

Author: JeremyCloarec

tests/cases/entities.py

@@ -1318,7 +1318,7 @@ def base_class(self):
         return self.own_class()
 
     def update_data(self):
-        return {"platform_title": "This is a test platform", "platform_theme": "light"}
+        return {"platform_title": "This is a test platform"}
 
     def get_filter(self):
         return None