Deletes multiple messages. This is a batch version of DeleteMessage. The result of the delete action on each message is reported individually in the response.
IMPORTANT: Because the batch request can result in a combination of successful and unsuccessful actions, you should check for batch errors even when the call returns an HTTP status code of 200.
NOTE:Some API actions take lists of parameters. These lists are specified using the param.n notation. Values of n are integers starting from 1. For example, a parameter list with two elements looks like this:
&Attribute.1=this
&Attribute.2=that