docs: updated docs to use cargo make

nl-sys/build.rs

@@ -13,8 +13,6 @@
 // You should have received a copy of the GNU Affero General Public License
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-use std::fs;
-
 fn main() -> std::io::Result<()> {
     cc::Build::new().file("src/bridge.c").compile("bridge");
 
@@ -24,7 +22,5 @@ fn main() -> std::io::Result<()> {
     println!("cargo:rustc-link-lib=static=nl-3");
     println!("cargo:rustc-link-lib=static=nl-route-3");
 
-    fs::remove_file("libnl/configure~")?;
-
     Ok(())
 }