code: function(removeTarget) {
          var me = this,
              target = me.target;
  
          me.bindings = [];
          me.disable();
          if (removeTarget === true) {
              if (target.isComponent) {
                  target.destroy();
              } else {
                  target.remove();
              }
          }
          delete me.target;
      }
docs: Destroys the KeyMap instance and removes all handlers.
  @param {Boolean} removeTarget True to also remove the {@link #target}