util: wireguard is merged into upstream kernel

src/basic/linux/update.sh

@@ -3,11 +3,7 @@
 set -eu
 
 for i in *.h */*.h; do
-    if [[ $i == 'wireguard.h' ]]; then
-        curl https://raw.githubusercontent.com/WireGuard/WireGuard/master/src/uapi/$i -o $i
-    else
-        curl https://raw.githubusercontent.com/torvalds/linux/master/include/uapi/linux/$i -o $i
-    fi
+    curl https://raw.githubusercontent.com/torvalds/linux/master/include/uapi/linux/$i -o $i
 
     sed -i -e 's/__user //g' -e '/^#include <linux\/compiler.h>/ d' $i
 done