configure: do not check for kill
configure: do not check for kill

Introduced by:
commit 3c37a171a2dea8048dfee90e1be2875f30f7eb15
    Add check for kill() to fix build of cgroups on win32

Made redundant by:
commit 02f1fd41f60c90b636ba0e18b37d4624fe47135d
    cgroup macros refactoring, part 1

Signed-off-by: Ján Tomko <4cab11cfb98d3c937327354a78eb07dbb6ee2bc6@redhat.com>
Reviewed-by: Erik Skultety <2c14d38fa47c8799f1b9c16280abe27f8edfec6e@redhat.com>

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