x86/hyperv: remove unused linux/version.h header

That header is not needed in hv_proc.c.
Reported-by: NHulk Robot <hulkci@huawei.com>
Signed-off-by: NYongjun Zheng <zhengyongjun3@huawei.com>
Link: https://lore.kernel.org/r/20210326064942.3263776-1-zhengyongjun3@huawei.comSigned-off-by: NWei Liu <wei.liu@kernel.org>

arch/x86/hyperv/hv_proc.c

 // SPDX-License-Identifier: GPL-2.0
 #include <linux/types.h>
-#include <linux/version.h>
 #include <linux/vmalloc.h>
 #include <linux/mm.h>
 #include <linux/clockchips.h>