media_viewer: Remove zoom controls

Until we get a proper image viewer widget, we've
decided that it's best to remove the zoom controls
instead of having broken ones.
4 jobs for <span class="ref-name">wip/christopherdavis/redesign-image-viewer</span> in 19 minutes and 42 seconds (queued for 1 second)
Status Job ID Name Coverage
  Check
passed #261190
check

00:00:26

 
  Test
passed #261191
flatpak

00:18:16

 
  Review
passed #261192
review

00:00:41

failed #261193
allowed to fail manual
stop_review

00:00:18

 
Name Stage Failure
failed
stop_review Review
Using Docker executor with image fedora:29 ...
Pulling docker image fedora:29 ...
Using docker image sha256:d09302f77cfcc3e867829d80ff47f9e7738ffef69730d54ec44341a9fb1d359b for fedora:29 ...
Running on runner-d836cf30-project-164-concurrent-0 via gcc150.bak.milne.osuosl.org...
Cloning repository...
Cloning into '/builds/BrainBlasted/fractal'...
Checking out d0887529 as wip/christopherdavis/redesign-image-viewer...
fatal: reference is not a tree: d0887529faee6c36eb146b2a041023faa5a19019
ERROR: Job failed: exit code 1