Remove CUI (#8384)

* remove CUI

* fix loading

* fix login middleware

* remove css template functions

* tmp fix for recurtion

* remove old test

* fix assertations

* fix middleware tests

* re-add plugin tags

* remove thirdpartjs

* re-add mfa urls

* remove old js

* remove cui tags

* simplify error testing

* use license endpoint for testing instead

* disable successful test

* revert de-activation

* remove references to old UI customisation

* update docs to remove reference to removed page

* disable availabilty check

* possible fix to importing problem

* Revert "possible fix to importing problem"

This reverts commit ee9fccdc8c.

* remove old get_context_data

* fix migration

* remove unused function

* remove unused stuff

* remove unused template

* fix formatting of readme

.github/actions/setup/action.yaml

@@ -72,13 +72,6 @@ runs:
         uses: actions/setup-node@1a4442cacd436585916779262731d5b162bc6ec7  # pin to v3.8.2
         with:
           node-version: ${{ env.node_version }}
-          cache: 'npm'
-          cache-dependency-path: src/backend/package-lock.json
-      - name: Install npm packages
-        if: ${{ inputs.npm == 'true' }}
-        shell: bash
-        run: cd src/backend && npm install
-
       # OS installs
       - name: Install OS Dependencies
         if: ${{ inputs.apt-dependency }}