Revert "assets/apps.js: Explicitely initialize window.adhocracy4"
Revert "assets/apps.js: Explicitely initialize window.adhocracy4"

This reverts commit 67da6ce17e8567e23450e2a3df46cd1fc004f781.

It turns out that this was caused by having the js code from a4
being loaded to vendor (which was necessary to get code sharing to
work properly). As we have now merged `vendor` into `adhocracy4`,
this is not necessary any more. Thus revert to previous behaviour.

liqd/a4-meinberlin,liqd/a4-meinberlin,liqd/a4-meinberlin,liqd/a4-meinberlin