Revert "refactored content_type to use to_params"
Revert "refactored content_type to use to_params"

This reverts commit f9e6b88504aa30d4aecb80f7ac8e300afeffd6da.

sinatra/sinatra,howtolearntocode/sinatra,burningTyger/sinatra,jkowens/sinatra,autopp/sinatra,porras/sinatra,kyontan/sinatra,frechei/sinatra,emiliocorpus/sinatra,eileencodes/sinatra,d-bot/sinatra,gferguson-gd/sinatra,miyazawatomoka/sinatra,emiliocorpus/sinatra,DoraALin/sinatra,ksw2599/sinatra,d-bot/sinatra,RosenDimov/sinatra,laplaceliu/sinatra,howtolearntocode/sinatra,mwpastore/sinatra,trexnix/sinatra,Wirachmat/sinatra,davydovanton/sinatra,porras/sinatra,eileencodes/sinatra,kyontan/sinatra,ktw1222/sinatra,dariubs/sinatra,davydovanton/sinatra,Rayheng/sinatra,siberianbear/sinatra,burningTyger/sinatra,ksw2599/sinatra,nju520/sinatra,JonMidhir/sinatra,laplaceliu/sinatra,siberianbear/sinatra,nicoayala/sinatra,caffo/sinatra,marocchino/sinatra,Callygraphy/morrissey,Rayheng/sinatra,ganmacs/sinatra,defsprite/sinatra,JonMidhir/sinatra,ryanshaw/sinatra,twanies/sinatra,kumji/sinatra,gferguson-gd/sinatra,nju520/sinatra,mwpastore/sinatra,frechei/sinatra,wzheng1/sinatra,ryanshaw/sinatra,ABaldwinHunter/sinatra-classic,jenalgit/sinatra,jeffbski/sinatra,JonRowe/sinatra,defsprite/sinatra,twanies/sinatra,kgrz/sinatra,cyberid41/sinatra,QLGu/sinatra,wzheng1/sinatra,sethuster/sinatra,ABaldwinHunter/sinatra-classic,ganmacs/sinatra,mwpastore/sinatra,bmizerany/sinatra,midorineko/sinatra,lastcat/sinatra,JonMidhir/sinatra,jenalgit/sinatra,DoraALin/sinatra,cyberid41/sinatra,JonRowe/sinatra,lastcat/sinatra,miyazawatomoka/sinatra,QLGu/sinatra,sinatra/sinatra,kumji/sinatra,guidohcosta/sinatra,Wirachmat/sinatra,jkowens/sinatra,petergunz/sinatra,RosenDimov/sinatra,blambeau/sinatra,nottombrown/old-sinatra,nottombrown/old-sinatra,autopp/sinatra,ktw1222/sinatra,jkowens/sinatra,nicoayala/sinatra,midorineko/sinatra,burningTyger/sinatra,guidohcosta/sinatra,dariubs/sinatra,trexnix/sinatra,sethuster/sinatra