remote: remove outdated comment about Solaris
remote: remove outdated comment about Solaris

When removing a conditional in:

  commit da1ade7a52e040192c5e9396c15ec9225a0a2c48
  Author: Daniel P. Berrangé <bb938cf255e055ff3507f2627d214e8e62118fcf@redhat.com>
  Date:   Fri Mar 23 10:50:59 2018 +0000

    remote: remove some __sun conditionals

the corresponding comment was mistakenly left behind.

Signed-off-by: Daniel P. Berrangé <bb938cf255e055ff3507f2627d214e8e62118fcf@redhat.com>

libvirt/libvirt,nertpinx/libvirt,libvirt/libvirt,andreabolognani/libvirt,eskultety/libvirt,nertpinx/libvirt,olafhering/libvirt,nertpinx/libvirt,libvirt/libvirt,zippy2/libvirt,andreabolognani/libvirt,jfehlig/libvirt,andreabolognani/libvirt,eskultety/libvirt,zippy2/libvirt,fabianfreyer/libvirt,jardasgit/libvirt,jardasgit/libvirt,andreabolognani/libvirt,jardasgit/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,crobinso/libvirt,andreabolognani/libvirt,crobinso/libvirt,jardasgit/libvirt,jfehlig/libvirt,zippy2/libvirt,jfehlig/libvirt,zippy2/libvirt,jfehlig/libvirt,olafhering/libvirt,eskultety/libvirt,eskultety/libvirt,fabianfreyer/libvirt,nertpinx/libvirt,libvirt/libvirt,fabianfreyer/libvirt,fabianfreyer/libvirt,crobinso/libvirt,olafhering/libvirt,jardasgit/libvirt,olafhering/libvirt,eskultety/libvirt,crobinso/libvirt