Refactor deleteWakeupFromUserStarts in UserWakeupStore

     * @return true if an entry is found and the list of wakeups changes.

     */

    private boolean deleteWakeupFromUserStarts(int userId) {

        int index;

        synchronized (mUserWakeupLock) {

            index = mUserStarts.indexOfKey(userId);

            final int index = mUserStarts.indexOfKey(userId);

            if (index >= 0) {

                mUserStarts.removeAt(index);

                return true;

            }

            return false;

        }

        return index >= 0;

    }

    /**