utility.js: remove unused get_url_parameter function.

Unused since 025d66a6.

app/javascript/src/javascripts/utility.js

@@ -114,21 +114,6 @@ Utility.regexp_escape = function(string) {
   return string.replace(/([.?*+^$[\]\\(){}|-])/g, "\\$1");
 }
 
-Utility.get_url_parameter = function(sParam) {
-  var sPageURL = decodeURIComponent(window.location.search.substring(1)),
-      sURLVariables = sPageURL.split('&'),
-      sParameterName,
-      i;
-
-  for (i = 0; i < sURLVariables.length; i++) {
-    sParameterName = sURLVariables[i].split('=');
-
-    if (sParameterName[0] === sParam) {
-      return sParameterName[1] === undefined ? true : sParameterName[1];
-    }
-  }
-};
-
 Utility.sorttable = function(table) {
   table.stupidtable();
   table.bind("aftertablesort", function(event, data) {
@@ -182,4 +167,4 @@ $(function() {
   })
 });
 
-export default Utility
+export default Utility