unconditionally. Instead, don't check for the existence of index.theme.
This will allow us to catch errors that may be happening because of a
missing dependency in the chain.
Some hidden issues may appear, in which case please contact me.
discussed with and ok blind jasper@
The reason is that if a theme is removed after updating to a new version,
then we are left over with a useless cache file because we are using
pkg_add -u and not pkg_delete.
PLIST and delete everything under the @sample'd directory instead of the
directory itself to prevent a warning from pkg_delete(1) trying to
remove a non existing directory and to help preventing left-over files
and directories.
