inc: zap an unused function

src/etc/inc/util.inc

@@ -25,6 +25,7 @@
 	ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 	POSSIBILITY OF SUCH DAMAGE.
 */
+
 require_once("IPv6.inc");
 
 function killbyname($procname, $sig = 'TERM')
@@ -565,11 +566,6 @@ function group_ports($ports) {
 	return $result;
 }
 
-/* returns true if $val is a valid shaper bandwidth value */
-function is_valid_shaperbw($val) {
-	return (preg_match("/^(\d+(?:\.\d+)?)([MKG]?b|%)$/", $val));
-}
-
 /* returns true if $test is in the range between $start and $end */
 function is_inrange_v4($test, $start, $end) {
 	if ( (ip2ulong($test) <= ip2ulong($end)) && (ip2ulong($test) >= ip2ulong($start)) )