code: def remove_s3_credentials():
      """Removes S3 credentials passed to H2O using method set_s3_credentials. Doesn't affect credentials
      stored in instance variables or any other credentials source.
      """
      params = {
          "secret_key_id": "delete",
          "secret_access_key": "delete",
      }
      h2o.api("DELETE /3/PersistS3", data=params)
      print("Credentials successfully removed.")
  
label_desc: Use image node_id 2 for calling a global function with example usage: remove_s3_credentials() without return types