code: function SessionStorage_remove(key) {
          var nKey = this.config.key_prefix + key,
              tKey = nKey + '_TIME';
          // clear old timeout to avoid memory leak
          if (this.timeouts.hasOwnProperty(tKey)) {
              clearTimeout(this.timeouts[tKey]);
              // remove old time key
              delete this.timeouts[tKey];
          }
          return this.config.storage.remove(nKey);
      }
docs: @since 0.0.1
  @author Igor Ivanovic
  @method SessionStorage#remove
  
  @description
  Remove key from cache