remove old style persist option

Author: yaugenst-flex

tidy3d/config/manager.py

@@ -424,10 +424,8 @@ def _extract_persisted(schema: type[BaseModel], data: dict[str, Any]) -> dict[st
     persisted: dict[str, Any] = {}
     for field_name, field in schema.__fields__.items():
         extra = getattr(field.field_info, "extra", {}) or {}
-        persist = extra.get("persist")
-        if not persist:
-            schema_extra = extra.get("json_schema_extra", {})
-            persist = schema_extra.get("persist") if isinstance(schema_extra, dict) else False
+        schema_extra = extra.get("json_schema_extra", {})
+        persist = schema_extra.get("persist") if isinstance(schema_extra, dict) else False
         if not persist:
             continue
         if field_name not in data: