net: tipc: remove unused hardirq.h

Preempt counter APIs have been split out, currently, hardirq.h just
includes irq_enter/exit APIs which are not used by TIPC at all.

So, remove the unused hardirq.h.

Signed-off-by: Yang Shi <[email protected]>
Acked-by: Ying Xue <[email protected]>
Tested-by: Ying Xue <[email protected]>
Cc: Jon Maloy <[email protected]>
Cc: "David S. Miller" <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

Author: Yang Shi

net/tipc/core.h

@@ -49,7 +49,6 @@
 #include <linux/uaccess.h>
 #include <linux/interrupt.h>
 #include <linux/atomic.h>
-#include <asm/hardirq.h>
 #include <linux/netdevice.h>
 #include <linux/in.h>
 #include <linux/list.h>