configure: libSM seems to be unused

Submitted by Michał Górny @mgorny

Assigned to Olivier Fourdan @olivier

Link to original bug (#11914)

Description

xfwm4's configure.ac has:

XDT_CHECK_LIBSM

but none of Makefile.am files references LIBSM_* and I don't see any of libSM headers being included or routines called. Maybe the dependency is outdated?

See also

• https://bugzilla.xfce.org/show_bug.cgi?id=11744