fix: remove useless variable k (#6524)

remove useless variable k

---------

Co-authored-by: Bagatur <baskaryan@gmail.com>

langchain/tools/ddg_search/tool.py

@@ -44,7 +44,7 @@ class DuckDuckGoSearchRun(BaseTool):
 
 
 class DuckDuckGoSearchResults(BaseTool):
-    """Tool that queries the Duck Duck Go Search API and get back json."""
+    """Tool that queries the DuckDuckGo search API and get back json."""
 
     name = "DuckDuckGo Results JSON"
     description = (

langchain/utilities/duckduckgo_search.py

@@ -12,10 +12,9 @@ from pydantic.class_validators import root_validator
 class DuckDuckGoSearchAPIWrapper(BaseModel):
     """Wrapper for DuckDuckGo Search API.
 
-    Free and does not require any setup
+    Free and does not require any setup.
     """
 
-    k: int = 10
     region: Optional[str] = "wt-wt"
     safesearch: str = "moderate"
     time: Optional[str] = "y"