langchain

580861e7 - Revert "Make serpapi base url configurable via env (#4402)" (#4750)

Revert "Make serpapi base url configurable via env (#4402)" (#4750) This reverts commit 5111bec54071e42a7865766dc8bb8dc72c1d13b4. This PR introduced a bug in the async API (the `url` param isn't bound); it also didn't update the synchronous API correctly, which makes it error-prone (the behavior of the async and sync endpoints would be different)