Remove outdated guide on using rack builder w/o rails middleware
Remove outdated guide on using rack builder w/o rails middleware

[ci skip]

matrinox/rails,EmmaB/rails-1,yalab/rails,matrinox/rails,kirs/rails-1,mijoharas/rails,88rabbit/newRails,coreyward/rails,Stellenticket/rails,joonyou/rails,Erol/rails,joonyou/rails,yasslab/railsguides.jp,MichaelSp/rails,kenta-s/rails,tgxworld/rails,bolek/rails,mohitnatoo/rails,pvalena/rails,repinel/rails,hanystudy/rails,pschambacher/rails,jeremy/rails,vipulnsward/rails,odedniv/rails,sealocal/rails,Stellenticket/rails,Erol/rails,bogdanvlviv/rails,betesh/rails,schuetzm/rails,Spin42/rails,esparta/rails,Envek/rails,Edouard-chin/rails,maicher/rails,printercu/rails,gavingmiller/rails,richseviora/rails,Vasfed/rails,flanger001/rails,mathieujobin/reduced-rails-for-travis,vipulnsward/rails,sealocal/rails,tijwelch/rails,MichaelSp/rails,esparta/rails,illacceptanything/illacceptanything,Vasfed/rails,samphilipd/rails,palkan/rails,Spin42/rails,untidy-hair/rails,shioyama/rails,mtsmfm/rails,illacceptanything/illacceptanything,Envek/rails,stefanmb/rails,kddeisz/rails,notapatch/rails,betesh/rails,schuetzm/rails,arunagw/rails,marklocklear/rails,esparta/rails,arjes/rails,vipulnsward/rails,kmcphillips/rails,richseviora/rails,notapatch/rails,Spin42/rails,arunagw/rails,baerjam/rails,assain/rails,illacceptanything/illacceptanything,mechanicles/rails,mechanicles/rails,mathieujobin/reduced-rails-for-travis,vassilevsky/rails,travisofthenorth/rails,eileencodes/rails,iainbeeston/rails,flanger001/rails,alecspopa/rails,kamipo/rails,betesh/rails,prathamesh-sonpatki/rails,bolek/rails,kddeisz/rails,MSP-Greg/rails,utilum/rails,hanystudy/rails,rails/rails,gcourtemanche/rails,lcreid/rails,Envek/rails,mechanicles/rails,betesh/rails,deraru/rails,yhirano55/rails,Edouard-chin/rails,88rabbit/newRails,assain/rails,voray/rails,brchristian/rails,coreyward/rails,rossta/rails,kddeisz/rails,kamipo/rails,iainbeeston/rails,tjschuck/rails,illacceptanything/illacceptanything,yasslab/railsguides.jp,bogdanvlviv/rails,rbhitchcock/rails,fabianoleittes/rails,felipecvo/rails,BlakeWilliams/rails,flanger001/rails,utilum/rails,odedniv/rails,kddeisz/rails,alecspopa/rails,baerjam/rails,arjes/rails,arunagw/rails,kachick/rails,kirs/rails-1,yawboakye/rails,Stellenticket/rails,eileencodes/rails,Vasfed/rails,shioyama/rails,rafaelfranca/omg-rails,tjschuck/rails,joonyou/rails,lcreid/rails,marklocklear/rails,brchristian/rails,aditya-kapoor/rails,MichaelSp/rails,bogdanvlviv/rails,assain/rails,georgeclaghorn/rails,aditya-kapoor/rails,gavingmiller/rails,kaspth/rails,mtsmfm/railstest,sealocal/rails,baerjam/rails,kenta-s/rails,iainbeeston/rails,Edouard-chin/rails,prathamesh-sonpatki/rails,sergey-alekseev/rails,shioyama/rails,kirs/rails-1,mtsmfm/rails,repinel/rails,deraru/rails,gfvcastro/rails,pvalena/rails,bradleypriest/rails,rbhitchcock/rails,yahonda/rails,lucasmazza/rails,bogdanvlviv/rails,riseshia/railsguides.kr,palkan/rails,kmayer/rails,tgxworld/rails,yahonda/rails,yhirano55/rails,repinel/rails,Sen-Zhang/rails,gavingmiller/rails,schuetzm/rails,ttanimichi/rails,lucasmazza/rails,Sen-Zhang/rails,sergey-alekseev/rails,prathamesh-sonpatki/rails,illacceptanything/illacceptanything,jeremy/rails,gcourtemanche/rails,kachick/rails,coreyward/rails,koic/rails,jeremy/rails,georgeclaghorn/rails,deraru/rails,odedniv/rails,kmcphillips/rails,pvalena/rails,vassilevsky/rails,sergey-alekseev/rails,assain/rails,starknx/rails,voray/rails,jeremy/rails,ledestin/rails,matrinox/rails,esparta/rails,iainbeeston/rails,gfvcastro/rails,yasslab/railsguides.jp,printercu/rails,illacceptanything/illacceptanything,tgxworld/rails,MSP-Greg/rails,mijoharas/rails,riseshia/railsguides.kr,elfassy/rails,notapatch/rails,yalab/rails,arunagw/rails,stefanmb/rails,rails/rails,richseviora/rails,mijoharas/rails,ledestin/rails,deraru/rails,utilum/rails,yahonda/rails,stefanmb/rails,untidy-hair/rails,amoody2108/TechForJustice,illacceptanything/illacceptanything,utilum/rails,Sen-Zhang/rails,samphilipd/rails,marklocklear/rails,joonyou/rails,ngpestelos/rails,EmmaB/rails-1,amoody2108/TechForJustice,untidy-hair/rails,gcourtemanche/rails,alecspopa/rails,rossta/rails,baerjam/rails,arjes/rails,samphilipd/rails,gfvcastro/rails,kamipo/rails,palkan/rails,starknx/rails,koic/rails,MSP-Greg/rails,repinel/rails,illacceptanything/illacceptanything,xlymian/rails,rafaelfranca/omg-rails,Stellenticket/rails,brchristian/rails,tjschuck/rails,vipulnsward/rails,felipecvo/rails,tijwelch/rails,yhirano55/rails,vassilevsky/rails,lcreid/rails,maicher/rails,palkan/rails,voray/rails,MSP-Greg/rails,yasslab/railsguides.jp,notapatch/rails,yahonda/rails,mtsmfm/railstest,ngpestelos/rails,illacceptanything/illacceptanything,yhirano55/rails,felipecvo/rails,Erol/rails,amoody2108/TechForJustice,ledestin/rails,lucasmazza/rails,tjschuck/rails,rafaelfranca/omg-rails,printercu/rails,flanger001/rails,yalab/rails,gauravtiwari/rails,illacceptanything/illacceptanything,EmmaB/rails-1,travisofthenorth/rails,illacceptanything/illacceptanything,gauravtiwari/rails,Vasfed/rails,mtsmfm/rails,pschambacher/rails,pschambacher/rails,riseshia/railsguides.kr,kaspth/rails,elfassy/rails,yawboakye/rails,xlymian/rails,kmayer/rails,eileencodes/rails,illacceptanything/illacceptanything,rails/rails,aditya-kapoor/rails,kmcphillips/rails,tijwelch/rails,kmayer/rails,yalab/rails,mechanicles/rails,ttanimichi/rails,kmcphillips/rails,mohitnatoo/rails,illacceptanything/illacceptanything,Envek/rails,lcreid/rails,tgxworld/rails,rossta/rails,elfassy/rails,BlakeWilliams/rails,yawboakye/rails,ttanimichi/rails,88rabbit/newRails,illacceptanything/illacceptanything,fabianoleittes/rails,bradleypriest/rails,kachick/rails,hanystudy/rails,pvalena/rails,maicher/rails,mohitnatoo/rails,BlakeWilliams/rails,kaspth/rails,rbhitchcock/rails,Erol/rails,fabianoleittes/rails,ngpestelos/rails,Edouard-chin/rails,riseshia/railsguides.kr,yawboakye/rails,kenta-s/rails,travisofthenorth/rails,fabianoleittes/rails,mtsmfm/railstest,printercu/rails,mathieujobin/reduced-rails-for-travis,shioyama/rails,schuetzm/rails,xlymian/rails,rails/rails,georgeclaghorn/rails,koic/rails,untidy-hair/rails,illacceptanything/illacceptanything,travisofthenorth/rails,eileencodes/rails,mohitnatoo/rails,prathamesh-sonpatki/rails,starknx/rails,bradleypriest/rails,gauravtiwari/rails,georgeclaghorn/rails,gfvcastro/rails,bolek/rails,BlakeWilliams/rails,aditya-kapoor/rails