style(proxy): trim redundant validation comment

litellm/proxy/proxy_cli.py

@@ -1228,10 +1228,6 @@ def run_server(
             if general_settings is None:
                 general_settings = {}
             elif not isinstance(general_settings, dict):
-                # A non-dict `general_settings` (e.g. a bare string from a
-                # malformed YAML block) otherwise surfaces as a cryptic
-                # `AttributeError: 'str' object has no attribute 'get'` deep in
-                # startup. Fail fast with a message that points at the config.
                 raise ValueError(
                     "`general_settings` in the proxy config must be a mapping "
                     f"(got {type(general_settings).__name__}). Check the "