audit: stop demanding a HTTP HEAD mirror for curl
audit: stop demanding a HTTP HEAD mirror for curl

Not sure if this is how you want to handle it but having a HEAD mirror
for `curl` is just silliness.

Ref: https://github.com/Homebrew/homebrew-core/commit/e36b95849ae38ade30605155d75cf6e731b4e38f

palxex/brew,EricFromCanada/brew,nandub/brew,claui/brew,reitermarkus/brew,EricFromCanada/brew,alyssais/brew,mahori/brew,mgrimes/brew,JCount/brew,Linuxbrew/brew,mgrimes/brew,vitorgalvao/brew,reelsense/brew,JCount/brew,MikeMcQuaid/brew,ilovezfs/brew,sjackman/homebrew,DomT4/brew,claui/brew,amar-laksh/brew_sudo,vitorgalvao/brew,maxim-belkin/brew,nandub/brew,mahori/brew,maxim-belkin/brew,Linuxbrew/brew,konqui/brew,Homebrew/brew,konqui/brew,reelsense/brew,DomT4/brew,palxex/brew,ilovezfs/brew,jmsundar/brew,MikeMcQuaid/brew,claui/brew,EricFromCanada/brew,reelsense/brew,jmsundar/brew,palxex/brew,hanxue/linuxbrew,mahori/brew,sjackman/homebrew,reitermarkus/brew,JCount/brew,DomT4/brew,vitorgalvao/brew,claui/brew,vitorgalvao/brew,ilovezfs/brew,hanxue/linuxbrew,Linuxbrew/brew,mahori/brew,Linuxbrew/brew,DomT4/brew,jmsundar/brew,alyssais/brew,Homebrew/brew,maxim-belkin/brew,pseudocody/brew,JCount/brew,pseudocody/brew,alyssais/brew,nandub/brew,MikeMcQuaid/brew,amar-laksh/brew_sudo,Homebrew/brew,MikeMcQuaid/brew,konqui/brew,reitermarkus/brew,Homebrew/brew,pseudocody/brew,hanxue/linuxbrew,sjackman/homebrew,sjackman/homebrew,aw1621107/brew,mgrimes/brew,nandub/brew,EricFromCanada/brew,aw1621107/brew,aw1621107/brew,amar-laksh/brew_sudo,reitermarkus/brew,konqui/brew