Do you mean RMIServiceDeployer? That -rather confusingly- uses "RMI" to mean something else than what RMI usually means in the Java world. If you read that post -and also the responses, very important- you'll see that not everybody agrees that that service deployer is a good feature to have.
If you mean something else, please point us to where Axis uses it.
Remote is just a marker interface. Its javadocs state "The Remote interface serves to identify interfaces whose methods may be invoked from a non-local virtual machine." Arguably, this applies to web service calls even thouhg no RMI is involved.
RMIException is probably the closest to a fitting (existing) exception they found.
I'm fairly certain there's no actual RMI use involved, since that would tie the client and server to Java (and to particular, matching Java versions, actually) - something that runs counter to the whole concept of web services.