What unnecessary traditions, ideas or institutions should the world toss out? We try to answer that question in our annual Spring Cleaning feature. This year’s edition, to be published online May 3 and in the newspaper on May 5, includes college rankings, flip-flops and Texas. What would be on your list? Tell us what you think and why, and vote for the best reader ideas below. You can also read previous Spring Cleaning suggestions by clicking on the “Outlook picks” tab.