check: drop bpf.h include

This include is actually unused (probably leftover from an old version of
the kernel API when I was porting the patchsets); we can delete it.
Signed-off-by: Tycho Andersen <tycho.andersen@canonical.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

cr-check.c

@@ -13,7 +13,6 @@
 #include <signal.h>
 #include <linux/if.h>
 #include <linux/filter.h>
-#include <linux/bpf.h>
 #include <linux/seccomp.h>
 #include <sys/syscall.h>
 #include <sys/ioctl.h>