core: remove reference to a non-existing field of the theme struct
tree98083b0585c600d851626cd2b113d28949739880
drwxr-xr-x - core
drwxr-xr-x - debian
drwxr-xr-x - gentoo
drwxr-xr-x - misc
drwxr-xr-x - release
drwxr-xr-x - themes