Apply suggestions from code review

Co-authored-by: Wei Lee <weilee.rx@gmail.com>

airflow/providers/openai/hooks/openai.py

@@ -331,7 +331,7 @@ def get_file_by_name(self, file_name: str) -> FileObject | None:
         files = self.get_files()
         return next((file for file in files if file.filename == file_name), None)
 
-    def delete_file(self, file_id) -> FileDeleted:
+    def delete_file(self, file_id: str) -> FileDeleted:
         """
         Delete a file.
 
@@ -340,12 +340,12 @@ def delete_file(self, file_id) -> FileDeleted:
         response = self.conn.files.delete(file_id=file_id)
         return response
 
-    def create_vector_store(self, **kwargs) -> VectorStore:
+    def create_vector_store(self, **kwargs: Any) -> VectorStore:
         """Create a vector store."""
         vector_store = self.conn.beta.vector_stores.create(**kwargs)
         return vector_store
 
-    def get_vectors_stores(self, **kwargs) -> list[VectorStore]:
+    def get_vectors_stores(self, **kwargs: Any) -> list[VectorStore]:
         """Return a list of vector stores."""
         vector_stores = self.conn.beta.vector_stores.list(**kwargs)
         return vector_stores.data
@@ -370,7 +370,7 @@ def get_vector_store_by_name(self, vector_store_name: str) -> VectorStore | None
             (vector_store for vector_store in vector_stores if vector_store.name == vector_store_name), None
         )
 
-    def modify_vector_store(self, vector_store_id: str, **kwargs) -> VectorStore:
+    def modify_vector_store(self, vector_store_id: str, **kwargs: Any) -> VectorStore:
         """
         Modify a vector store.