Remove outdated `test_scoped_responds_to_delegated_methods`
Remove outdated `test_scoped_responds_to_delegated_methods`

This test was added at 74ed123 to ensure `respond_to?` delegate methods
to `Array` and `arel_table`. But array method delegation was removed at
9d79334 in favor of including `Enumerable`. And now `Relation` has
`insert`, `update`, and `delete` methods (63480d2, 8d31c9f, d5f9173).
So this delegation test is already outdated.

shioyama/rails,illacceptanything/illacceptanything,Stellenticket/rails,rails/rails,eileencodes/rails,Vasfed/rails,notapatch/rails,iainbeeston/rails,rafaelfranca/omg-rails,esparta/rails,kmayer/rails,Sen-Zhang/rails,georgeclaghorn/rails,betesh/rails,vipulnsward/rails,kmcphillips/rails,yawboakye/rails,bogdanvlviv/rails,MSP-Greg/rails,lcreid/rails,yalab/rails,odedniv/rails,yawboakye/rails,gcourtemanche/rails,fabianoleittes/rails,gfvcastro/rails,illacceptanything/illacceptanything,mathieujobin/reduced-rails-for-travis,rafaelfranca/omg-rails,yahonda/rails,iainbeeston/rails,yhirano55/rails,Sen-Zhang/rails,shioyama/rails,joonyou/rails,fabianoleittes/rails,aditya-kapoor/rails,tjschuck/rails,hanystudy/rails,untidy-hair/rails,mohitnatoo/rails,aditya-kapoor/rails,prathamesh-sonpatki/rails,joonyou/rails,jeremy/rails,eileencodes/rails,lcreid/rails,rails/rails,Envek/rails,starknx/rails,palkan/rails,utilum/rails,Edouard-chin/rails,kmayer/rails,yasslab/railsguides.jp,felipecvo/rails,notapatch/rails,kmcphillips/rails,iainbeeston/rails,illacceptanything/illacceptanything,pvalena/rails,flanger001/rails,utilum/rails,yawboakye/rails,utilum/rails,yalab/rails,repinel/rails,printercu/rails,esparta/rails,repinel/rails,kirs/rails-1,travisofthenorth/rails,alecspopa/rails,schuetzm/rails,palkan/rails,travisofthenorth/rails,betesh/rails,odedniv/rails,betesh/rails,mechanicles/rails,kaspth/rails,rafaelfranca/omg-rails,deraru/rails,MSP-Greg/rails,flanger001/rails,kirs/rails-1,ledestin/rails,prathamesh-sonpatki/rails,palkan/rails,bogdanvlviv/rails,prathamesh-sonpatki/rails,joonyou/rails,EmmaB/rails-1,prathamesh-sonpatki/rails,shioyama/rails,gfvcastro/rails,kaspth/rails,Vasfed/rails,MSP-Greg/rails,pvalena/rails,Edouard-chin/rails,Erol/rails,hanystudy/rails,tgxworld/rails,Erol/rails,gauravtiwari/rails,jeremy/rails,printercu/rails,Stellenticket/rails,assain/rails,Edouard-chin/rails,jeremy/rails,baerjam/rails,deraru/rails,illacceptanything/illacceptanything,notapatch/rails,yahonda/rails,travisofthenorth/rails,kmayer/rails,Envek/rails,travisofthenorth/rails,arunagw/rails,tjschuck/rails,georgeclaghorn/rails,yalab/rails,baerjam/rails,MSP-Greg/rails,Sen-Zhang/rails,esparta/rails,assain/rails,aditya-kapoor/rails,Vasfed/rails,gfvcastro/rails,joonyou/rails,kddeisz/rails,EmmaB/rails-1,ledestin/rails,Erol/rails,georgeclaghorn/rails,mohitnatoo/rails,hanystudy/rails,schuetzm/rails,pvalena/rails,illacceptanything/illacceptanything,kaspth/rails,Stellenticket/rails,untidy-hair/rails,assain/rails,yasslab/railsguides.jp,starknx/rails,ledestin/rails,kmcphillips/rails,yawboakye/rails,kddeisz/rails,tgxworld/rails,tjschuck/rails,kirs/rails-1,assain/rails,gcourtemanche/rails,rails/rails,BlakeWilliams/rails,illacceptanything/illacceptanything,mechanicles/rails,vipulnsward/rails,gauravtiwari/rails,repinel/rails,mathieujobin/reduced-rails-for-travis,odedniv/rails,yasslab/railsguides.jp,eileencodes/rails,rails/rails,gfvcastro/rails,EmmaB/rails-1,Erol/rails,illacceptanything/illacceptanything,untidy-hair/rails,felipecvo/rails,iainbeeston/rails,illacceptanything/illacceptanything,baerjam/rails,illacceptanything/illacceptanything,deraru/rails,felipecvo/rails,lcreid/rails,brchristian/rails,brchristian/rails,yhirano55/rails,yalab/rails,vipulnsward/rails,notapatch/rails,kmcphillips/rails,tgxworld/rails,utilum/rails,illacceptanything/illacceptanything,repinel/rails,tjschuck/rails,Envek/rails,BlakeWilliams/rails,pvalena/rails,alecspopa/rails,arunagw/rails,illacceptanything/illacceptanything,printercu/rails,esparta/rails,lcreid/rails,kamipo/rails,yhirano55/rails,baerjam/rails,tgxworld/rails,yahonda/rails,kddeisz/rails,kamipo/rails,vipulnsward/rails,bogdanvlviv/rails,gauravtiwari/rails,shioyama/rails,flanger001/rails,schuetzm/rails,mechanicles/rails,flanger001/rails,yasslab/railsguides.jp,Edouard-chin/rails,Envek/rails,schuetzm/rails,brchristian/rails,yhirano55/rails,BlakeWilliams/rails,illacceptanything/illacceptanything,mohitnatoo/rails,illacceptanything/illacceptanything,fabianoleittes/rails,illacceptanything/illacceptanything,bogdanvlviv/rails,Vasfed/rails,yahonda/rails,aditya-kapoor/rails,BlakeWilliams/rails,georgeclaghorn/rails,betesh/rails,jeremy/rails,printercu/rails,alecspopa/rails,mathieujobin/reduced-rails-for-travis,palkan/rails,deraru/rails,starknx/rails,untidy-hair/rails,arunagw/rails,Stellenticket/rails,eileencodes/rails,mohitnatoo/rails,kddeisz/rails,illacceptanything/illacceptanything,gcourtemanche/rails,arunagw/rails,kamipo/rails,mechanicles/rails,fabianoleittes/rails