ExAws.SQS.delete_message

You're seeing just the function delete_message, go back to ExAws.SQS module for more information.
Link to this function

delete_message(queue_url, receipt_handle)

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Specs

delete_message(queue_url :: binary(), receipt_handle :: binary()) ::
  ExAws.Operation.Query.t()

Delete a message from a SQS Queue

AWS API Docs