herbstluftwm: get rid of unnecessary cross workarounds.

srcpkgs/herbstluftwm/template

@@ -1,7 +1,7 @@
 # Template file for 'herbstluftwm'
 pkgname=herbstluftwm
 version=0.6.2
-revision=2
+revision=3
 hostmakedepends="pkg-config"
 makedepends="libXinerama-devel libglib-devel"
 conf_files="/etc/xdg/${pkgname}/autostart"
@@ -12,9 +12,6 @@ homepage="http://herbstluftwm.org"
 distfiles="http://herbstluftwm.org/tarballs/${pkgname}-${version}.tar.gz"
 checksum=a89f5c397aee7f1aa3b39dd53bc67e282679f02f1c0bf3c33c41a608e217f0ac
 
-do_configure() {
-	sed -e 's,-I/usr/include,,g' -i config.mk
-}
 do_build() {
 	make COLOR=0 CC=$CC LD=$CC CFLAGS="$CFLAGS -std=c99"
 }