removing direcotry-specific readme, will be documenting this info at the top-level
removing direcotry-specific readme, will be documenting this info at the top-level

BenKaehler/short-read-tax-assignment,nbokulich/short-read-tax-assignment,gregcaporaso/short-read-tax-assignment,caporaso-lab/tax-credit,caporaso-lab/short-read-tax-assignment