virt.tests: remove autotest.scrashme test

autotest.scrashme test is duplicate with autotest.flail, remove
autotest.scrashme test but no autotest.flail test because flail test's
"syscall_table" newer than scrashme test used;

Old syscalls that won't be tested anymore:

newstat
newfstat
newlstat
ni_syscall (uselib)
sysctl
umount
ni_syscall (create_module)
ni_syscall (get_kernel_syms)
ni_syscall (query_module)
ni_syscall (getpmsg)
ni_syscall (putpmsg)
ni_syscall (afs)
ni_syscall (tux)
ni_syscall (security)
ni_syscall (set_thread_area)
ni_syscall (get_thread_area)
ni_syscall (epoll_ctl_old)
ni_syscall (epoll_wait_old)
clock_retres
ni_syscall (vserver)
fstatat
timerfd
rt_tgsigqueueinfo
perf_counter_open

New syscalls that will be tested:

stat
fstat
lstat
uselib
_sysctl
umount2
create_module
get_kernel_syms
query_module
getpmsg
putpmsg
afs_syscall
tuxcall
security
set_thread_area
get_thread_area
epoll_ctl_old
epoll_wait_old
clock_getres
vserver
newfstatat
timerfd_create

Signed-off-by: Xu Tian <xutian@redhat.com>