Remove redundant assignning to `current_env`
Remove redundant assignning to `current_env`

This was introduced at https://github.com/rails/rails/commit/cfa1df4b07bee5b2bbcbf9edd2ac287b4fb23c18#diff-b36b9c41be30b05dc14d09d7f3b192efR436.

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