Revert "hasBody now checks if method is HEAD. (#468)"
Revert "hasBody now checks if method is HEAD. (#468)"

This reverts commit 22450c7b00b66d3093a882b2dc2c03a5b9028a3e.

yesodweb/wai,tolysz/wai,utdemir/wai,sordina/wai,erikd/wai,creichert/wai,kazu-yamamoto/wai,utdemir/wai,frontrowed/wai,yesodweb/wai,creichert/wai,utdemir/wai,erikd/wai,erikd/wai,utdemir/wai,erikd/wai,tolysz/wai,frontrowed/wai,sordina/wai,sordina/wai,kazu-yamamoto/wai,tolysz/wai,tolysz/wai,sordina/wai,frontrowed/wai,frontrowed/wai