Remove unused required config values from payment layoutset.

[Magnusrm]

Description

The studio team has had trouble explaining why some fields needs to be set while creating a UI for configuring payment.
Specifically the field "dataModel" in layout-sets.json should at least be optional, since you in most cases will not use any data from a datamodel directly in you layout. This property is per now required in order to avoid crashing the app.

Additional Information

The property was first introduced for payment as a result of re-using the config and process handling from the data-task.

Tasks

No response

Acceptance Criterias

No response

[olemartinorg]

Related:

• Support custom receipt without any data models #1970

Quoting from the issue:

We should support not specifying a default data type for a layout-set in general