Fix logs. Use dict.pop instead of del. Close #3473 (#3484)

### What problem does this PR solve?

Fix logs. Use dict.pop instead of del.

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

api/apps/sdk/dify_retrieval.py

@@ -58,8 +58,7 @@ def retrieval(tenant_id):
         )
         records = []
         for c in ranks["chunks"]:
-            if "vector" in c:
-                del c["vector"]
+            c.pop("vector", None)
             records.append({
                 "content": c["content_ltks"],
                 "score": c["similarity"],