Remove the installation of musescore3 from backports

ansible/roles/fuss_packages/tasks/main.yml

@@ -59,20 +59,6 @@
       - fuss-kids,fuss-children,fuss-education
   when: light is not defined or not light
 
-# TODO: musescore3 has been removed from buster and is only available from
-# buster-backports, but installing it before fuss-desktop may break systems, so
-# it has been removed from the dependencies of fuss-multimedia.
-# Since some schools still require it, and installing it afterwards is safe, we
-# are installing it here as a workaround, so that there is no need for manual
-# installations.
-# With bullseye, it can be moved back as a dependency of fuss-multimedia, and
-# the following two tasks can be dropped.
-- name: Install metapackage dependencies from backports
-  apt:
-      name: musescore3
-      state: present
-      default_release: buster-backports
-      update_cache: no
 - name: Update firmware packages from backports
   apt:
     name: '{{ item }}'