Hide Custom component type from component list

[nkylstad]

Description

This component does not seem to be in much use. In addition, setting up a custom component requires developer experience, and setting up the component manually seems like a more realistic use case. Suggest we hide this component for now, in order to avoid confusing users that do not have the technical expertise to set up a custom component.

Additional Information

Will only hide the component from the component toolbar, i.e. make it impossible to drag-n-drop the component into the app GUI. Apps with existing custom components will still display them as before in the app and preview, and we can easily add back if requested.

If we at some point add back the component, we should also ensure that the documentation regarding setup is up-to-date. Setup is currently only described in this github issue.

Tasks

• Remove CustomComponent from list of available components in component toolbar

Acceptance Criterias

• It is not possible to add a Custom component from component toolbar
• Custom component is not visible in component toolbar.