tests: virsh-optparse: Drop obsolete cpu-stats test cases
tests: virsh-optparse: Drop obsolete cpu-stats test cases

These test cases will start failing once the test driver provides
implementation for the virDomainGetCPUStats API.

Signed-off-by: Ilias Stamatis <3ef66acc2700f2eb6746a592b321628ebd41accf@gmail.com>
Reviewed-by: Erik Skultety <2c14d38fa47c8799f1b9c16280abe27f8edfec6e@redhat.com>

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