Remove orphaned functions for date string manipulations

lib/mysql.js

@@ -307,42 +307,6 @@ MySQL.prototype.updateOrCreate = function(model, data, options, cb) {
   this._modifyOrCreate(model, data, options, fields, cb);
 };
 
-function dateToMysql(dt, tz) {
-  if (!tz || tz == 'local') {
-    return dt.getFullYear() + '-' +
-      fillZeros(dt.getMonth() + 1) + '-' +
-      fillZeros(dt.getDate()) + ' ' +
-      fillZeros(dt.getHours()) + ':' +
-      fillZeros(dt.getMinutes()) + ':' +
-      fillZeros(dt.getSeconds());
-  } else {
-    tz = convertTimezone(tz);
-
-    if (tz !== false && tz !== 0) dt.setTime(dt.getTime() + (tz * 60000));
-
-    return dt.getUTCFullYear() + '-' +
-      fillZeros(dt.getUTCMonth() + 1) + '-' +
-      fillZeros(dt.getUTCDate()) + ' ' +
-      fillZeros(dt.getUTCHours()) + ':' +
-      fillZeros(dt.getUTCMinutes()) + ':' +
-      fillZeros(dt.getUTCSeconds());
-  }
-
-  function fillZeros(v) {
-    return v < 10 ? '0' + v : v;
-  }
-
-  function convertTimezone(tz) {
-    if (tz === 'Z') {
-      return 0;
-    }
-
-    var m = tz.match(/([\+\-\s])(\d\d):?(\d\d)?/);
-    if (m) return (m[1] == '-' ? -1 : 1) * (parseInt(m[2], 10) + ((m[3] ? parseInt(m[3], 10) : 0) / 60)) * 60;
-    return false;
-  }
-}
-
 MySQL.prototype.getInsertedId = function(model, info) {
   var insertedId = info && typeof info.insertId === 'number' ?
     info.insertId : undefined;