Breaking: #75747 - EXT:form - Removed useDefaultContentObject setting

See Issue #75747

Description

The TypoScript option useDefaultContentObject of the FORM cObject has been removed. Setting this value to 0 allowed the usage of the prehistoric content type mailform.

Impact

It is not possible to configure the rendering of the FORM cOject. The setting is not evaluated anymore.

Affected Installations

Any installation that uses the TypoScript option useDefaultContentObject = 0.

Migration

Remove the TypoScript option from any TypoScript settings. Migrate manually to use the features of EXT:form.