Remove type attribute of mam request

Makes mam queries look like the XEP-0313 examples
3 jobs for RemoveTypeOfMamRequest in 2 minutes and 48 seconds
latest
Status Job ID Name Coverage
  Test
passed #10883
run-appdata

00:00:05

passed #10882
run-tests

00:02:33

 
  Build
passed #10884
run-build

00:00:09