libvirt.spec.in: remove dtrace conditional
libvirt.spec.in: remove dtrace conditional

Both RHEL and Fedora build with dtrace enabled at all
times.

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

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