sync.profile file missing from Qt Quick Timeline repository

In tqtc/lts-5.15 branch, the sync.profile file is missing from qt/tqtc-qtquicktimeline repository.

The following error note appears when running the syncqt.pl script:

 
perl ../qtbase/bin/syncqt.pl -version 5.15.5 -builddir .
Could not find any sync.profile for your module!
Pass <module directory> to syncqt to sync your header files.
syncqt failed at ../qtbase/bin/syncqt.pl line 892.
 
This was found in the release team (Antti Kokko). Please let us know if this is a feature instead of a bug.