check: dump seccomp filters is in --ms

As of 4.4,
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f8e529ed9
c/r of seccomp filters is supported, so let's check for it in --ms.
Signed-off-by: Tycho Andersen <tycho.andersen@canonical.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

cr-check.c

@@ -663,11 +663,6 @@ static int check_ptrace_dump_seccomp_filters(void)
 	pid_t pid;
 	int ret = 0, len;
 
-	if (opts.check_ms_kernel) {
-		pr_warn("Skipping PTRACE_SECCOMP_GET_FILTER check");
-		return 0;
-	}
-
 	pid = fork_and_ptrace_attach(setup_seccomp_filter);
 	if (pid < 0)
 		return -1;