media-sound/pulseaudio: drop sound@ from maintainers

media-sound/pulseaudio: drop sound@ from maintainers

sound project has in practice never maintained pulseaudio, it
just got added as such by flameeyes long time ago, and besides
him, no-one has been properly involved in it besides gnome@
project.
Adjust maintainer list to match reality, especially with sound@
being currently rather free-for-all with its members giving
carte blanche to changes of its packages without reviewing -
pulseaudio deserves more and it has a primary team already. Thus
the changes, to avoid issues and bad blood from a secondary team
giving carte blanche permissions for everything while the primary
team does not want that.

Package-Manager: Portage-2.3.40, Repoman-2.3.9