I wrote this in a poem and found out later that it didn't exist as a word. I was entirely surprised. It means simply enough "to remove from a shelf", or metaphorically, "to take from view" or "to obscure", etc.
Why there is information enough on any conceivable subject, and all within ten minutes walk of where we sit and write, to stupify Minerva; and it is as easy to unshelf, pick out, and embroider it upon an editorial, as it is to buy grapes at Bininger's.
--N. P. Willis, 1847, "Ephemera", The Miscellaneous Works of N. P. Willis, p. 48