Remove redundant announce calls from MusicRoutes

src/main/java/me/bobert/netneutrality/http/server/MusicRoutes.java

@@ -259,7 +259,6 @@ public final class MusicRoutes {
         int newVolume = volume(ctx);
 
         manager.setVolume(newVolume);
-        announce(manager, "Setting volume to " + newVolume);
         ctx.json(Map.of("status", "ok", "volume", newVolume));
     }
 
@@ -599,7 +598,6 @@ public final class MusicRoutes {
             throw new BadRequestResponse(result.getMessage());
         }
 
-        announce(manager, result.getMessage());
         ctx.json(resultBodyWithQueue(result, manager));
     }