qemu: process: Don't needlesly clear the perf events in qemuDomainPerfRestart
qemu: process: Don't needlesly clear the perf events in qemuDomainPerfRestart

At that point the perf events struct should not be allocated so there's
no use in clearing it.

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