fix: once openai proxy key is not available, the openai realtime conf proxy shall be empty

Author: thirdgerb

ghostos/framework/openai_realtime/configs.py

@@ -35,6 +35,8 @@ def load_from_env(self) -> Self:
             key = copied.proxy[1:]
             if key in environ:
                 copied.proxy = environ[key]
+            else:
+                copied.proxy = ""
         return copied