fix(feedback): remove things forgotten when model table dropped

See merge request !1326

Earlyer on the Feedback models table and some of its code were removed:
a19b58ff
[Cleaned up controller and schema](a19b58ff)

But there were several thing not removed along with it.
It didn't seem to have any direct consequences, but deploying to heroku
I ran in to some trouble with this.

Because of that I do this more explicit removal of other leftovers
found.

Fix: xlsx export spec and CI pipeline problems

See merge request !1321

fix: autocomlete

See merge request !1323

feat: small changes

See merge request !1318

feat: update stzh

See merge request !1317

fix: styling fixes

See merge request !1316

feat: remove node modules on assets clean

See merge request !1314

fix: skip terms of use acceptance if active template does not exist

See merge request !1313

fix: handle missing terms of use

See merge request !1312

fix: deploy

See merge request !1311

feat: edit pages texts fix

See merge request !1310

This reverts commit 5c88f80a.

feat: edit pages

See merge request !1309

fix: forms behviour

See merge request !1305