Remove redundant tier 1-4 prefixes from XSS challenge descriptions
Remove redundant tier 1-4 prefixes from XSS challenge descriptions

bonze/juice-shop,bkimminich/juice-shop,bkimminich/juice-shop,bkimminich/juice-shop,bonze/juice-shop,bkimminich/juice-shop,m4l1c3/juice-shop,bonze/juice-shop,bkimminich/juice-shop,bkimminich/juice-shop,m4l1c3/juice-shop,m4l1c3/juice-shop,m4l1c3/juice-shop,m4l1c3/juice-shop,bonze/juice-shop,bonze/juice-shop