DRY in Active Record Query Interface [ci skip]
DRY in Active Record Query Interface [ci skip]

The sentence "This is exactly the same as defining a class method ..."
is not true, so #33653 fixed it, but added changes repeat what is explained
a few lines below. We can remove this part since a user is able to get info
about the difference between scopes and class methods below.

Context https://github.com/rails/rails/pull/33653#discussion_r211105969.

Reverts #33653, 97feb4996b1c88f770101dfce6d4d3a6baf6bb33.

BlakeWilliams/rails,arunagw/rails,repinel/rails,shioyama/rails,illacceptanything/illacceptanything,shioyama/rails,joonyou/rails,BlakeWilliams/rails,baerjam/rails,iainbeeston/rails,jeremy/rails,fabianoleittes/rails,Edouard-chin/rails,Erol/rails,utilum/rails,flanger001/rails,repinel/rails,Stellenticket/rails,lcreid/rails,BlakeWilliams/rails,baerjam/rails,bogdanvlviv/rails,iainbeeston/rails,illacceptanything/illacceptanything,joonyou/rails,yhirano55/rails,Vasfed/rails,illacceptanything/illacceptanything,palkan/rails,illacceptanything/illacceptanything,mohitnatoo/rails,illacceptanything/illacceptanything,MSP-Greg/rails,illacceptanything/illacceptanything,arunagw/rails,tgxworld/rails,eileencodes/rails,mohitnatoo/rails,bogdanvlviv/rails,prathamesh-sonpatki/rails,fabianoleittes/rails,arunagw/rails,yahonda/rails,kddeisz/rails,illacceptanything/illacceptanything,rails/rails,rails/rails,Envek/rails,kmcphillips/rails,starknx/rails,Envek/rails,tjschuck/rails,arunagw/rails,yalab/rails,Envek/rails,tgxworld/rails,illacceptanything/illacceptanything,notapatch/rails,yahonda/rails,Erol/rails,rafaelfranca/omg-rails,eileencodes/rails,yhirano55/rails,Vasfed/rails,jeremy/rails,Erol/rails,georgeclaghorn/rails,tgxworld/rails,mechanicles/rails,bogdanvlviv/rails,kmcphillips/rails,iainbeeston/rails,palkan/rails,kddeisz/rails,yalab/rails,illacceptanything/illacceptanything,notapatch/rails,yalab/rails,Stellenticket/rails,schuetzm/rails,MSP-Greg/rails,prathamesh-sonpatki/rails,betesh/rails,EmmaB/rails-1,mohitnatoo/rails,vipulnsward/rails,EmmaB/rails-1,rails/rails,georgeclaghorn/rails,georgeclaghorn/rails,joonyou/rails,tgxworld/rails,rails/rails,yahonda/rails,betesh/rails,kddeisz/rails,mechanicles/rails,printercu/rails,Erol/rails,prathamesh-sonpatki/rails,fabianoleittes/rails,kddeisz/rails,betesh/rails,esparta/rails,Envek/rails,mohitnatoo/rails,kmcphillips/rails,illacceptanything/illacceptanything,yawboakye/rails,repinel/rails,kmcphillips/rails,yawboakye/rails,Stellenticket/rails,shioyama/rails,EmmaB/rails-1,yhirano55/rails,prathamesh-sonpatki/rails,esparta/rails,palkan/rails,baerjam/rails,iainbeeston/rails,Vasfed/rails,yahonda/rails,georgeclaghorn/rails,lcreid/rails,repinel/rails,bogdanvlviv/rails,BlakeWilliams/rails,Edouard-chin/rails,illacceptanything/illacceptanything,printercu/rails,illacceptanything/illacceptanything,yawboakye/rails,palkan/rails,vipulnsward/rails,Stellenticket/rails,gauravtiwari/rails,vipulnsward/rails,yalab/rails,eileencodes/rails,eileencodes/rails,esparta/rails,baerjam/rails,utilum/rails,shioyama/rails,MSP-Greg/rails,mechanicles/rails,tjschuck/rails,tjschuck/rails,jeremy/rails,schuetzm/rails,Edouard-chin/rails,notapatch/rails,flanger001/rails,yawboakye/rails,notapatch/rails,lcreid/rails,esparta/rails,utilum/rails,illacceptanything/illacceptanything,vipulnsward/rails,printercu/rails,fabianoleittes/rails,jeremy/rails,rafaelfranca/omg-rails,gauravtiwari/rails,gauravtiwari/rails,flanger001/rails,MSP-Greg/rails,Edouard-chin/rails,tjschuck/rails,schuetzm/rails,starknx/rails,starknx/rails,betesh/rails,joonyou/rails,lcreid/rails,mechanicles/rails,rafaelfranca/omg-rails,illacceptanything/illacceptanything,flanger001/rails,schuetzm/rails,illacceptanything/illacceptanything,utilum/rails,Vasfed/rails,yhirano55/rails,printercu/rails