IB/usnic: Remove unused includes of <linux/version.h>

Remove including <linux/version.h> that don't need it.
Signed-off-by: NWei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

drivers/infiniband/hw/usnic/usnic_ib.h

@@ -21,7 +21,6 @@
 
 #include <linux/iommu.h>
 #include <linux/netdevice.h>
-#include <linux/version.h>
 
 #include <rdma/ib_verbs.h>
 

drivers/infiniband/hw/usnic/usnic_uiom_interval_tree.c

@@ -2,7 +2,6 @@
 #include <linux/list.h>
 #include <linux/slab.h>
 #include <linux/list_sort.h>
-#include <linux/version.h>
 
 #include <linux/interval_tree_generic.h>
 #include "usnic_uiom_interval_tree.h"

drivers/infiniband/hw/usnic/usnic_uiom_interval_tree.h

@@ -19,7 +19,6 @@
 #ifndef USNIC_UIOM_INTERVAL_TREE_H_
 #define USNIC_UIOM_INTERVAL_TREE_H_
 
-#include <linux/version.h>
 #include <linux/rbtree.h>
 
 struct usnic_uiom_interval_node {