Update client.py (#51)

Minor fix

Author: twishabansal

src/toolbox_langchain_sdk/client.py

@@ -82,7 +82,6 @@ async def load_tool(self, tool_name: str) -> StructuredTool:
 
         Args:
             tool_name: The name of the tool to load.
-                Default: None. If not provided, then all the tools are loaded.
 
         Returns:
             A tool loaded from the Toolbox