index.js
function remove(scope, type) {
  if (scope === undefined) scope = "general";
  if (type === undefined) {
    delete _combines[scope];
    delete _reducers[scope];
  } else {
    delete _reducers[scope][type];
  }
}
function remove(scope, type) {
  if (scope === undefined) scope = "general";
  if (type === undefined) {
    delete _combines[scope];
    delete _reducers[scope];
  } else {
    delete _reducers[scope][type];
  }
}
remove - remove reducers by scope & type

@param  {string} scope state data scope
@param  {string} type  action.type that reducer affect
@returns {undefined}