Fix bugs about positional arguments in GeminiLLM/getLLM function.

llm_call.py

@@ -29,7 +29,7 @@ class GeminiLLM():
 
         return (retriever, vectorstore)
 
-    def getLLM(self, documents ):
+    def getLLM(self ):
         if os.getenv('GOOGLE_GEMINI_TOKEN') is None:
             raise ValueError("GOOGLE_GEMINI_TOKEN environment variable not set")
         else: