Comment 1 for bug 324215

The problem is that the same postrm script should be run for hwtest, hwtest-gtk, hwtest-cli, etc. So, instead of duplicating the same code, the original shorthand was to source the script from the hwtest package. However, the proper solution would be for the build process to copy the postrm script so that each package doesn't depend on the maintainer scripts of hwtest and the script only gets committed once upstream.