lustre: kill unused members of struct vvp_thread_info

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

drivers/staging/lustre/lustre/llite/llite_internal.h

@@ -938,10 +938,8 @@ struct ll_cl_context {
 };
 
 struct vvp_thread_info {
-	struct iovec	 vti_local_iov;
 	struct vvp_io_args   vti_args;
 	struct ra_io_arg     vti_ria;
-	struct kiocb	 vti_kiocb;
 	struct ll_cl_context vti_io_ctx;
 };