workspacesView: Small cleanup

scrollToActive() and friends are only used for handling the 'switch-workspace'
animation.

GNOME/gnome-shell!1333
9 jobs for !1333 with small-ws-cleanup in 7 minutes and 55 seconds (queued for 2 seconds)
detached
Status Job ID Name Coverage
  Review
passed #784271
check_commit_log

00:00:23

passed #784273
eslint

00:01:25

passed #784272
js_check

00:00:50

passed #784275
no_template_check

00:00:29

passed #784274
potfile_check

00:00:44

 
  Build
passed #784276
build

00:05:33

passed #784277
flatpak
flatpak

00:01:43

 
  Test
passed #784278
test

00:00:55

passed #784279
test-pot

00:00:56