xfce4-netload-plugin: remove dead code.

srcpkgs/xfce4-netload-plugin/template

@@ -11,12 +11,3 @@ license="GPL-2.0-or-later"
 homepage="https://goodies.xfce.org/projects/panel-plugins/xfce4-netload-plugin"
 distfiles="https://archive.xfce.org/src/panel-plugins/${pkgname}/${version%.*}/${pkgname}-${version}.tar.bz2"
 checksum=22e40425cfe1e07b01fe275b1afddc7c788af34d9c2c7e2842166963cb41215d
-
-pre_build() {
-	return
-	case "$XBPS_TARGET_MACHINE" in
-		*-musl) # There is no <sys/sysctl.h> in musl libc
-			sed -e "s;<sys/sysctl\.h>;<linux/sysctl.h>;" \
-				-i ${wrksrc}/panel-plugin/os.h
-	esac
-}