Removed unused NullContentTypeHeader after changes in #36996
Removed unused NullContentTypeHeader after changes in #36996

Rebuild CI

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