Revert "formula_installer: tweak dependent requirements."
Revert "formula_installer: tweak dependent requirements."

This reverts commit cc752e97f6dcfb3e58c9e753262926672edeb571.

Fixes #1585.

I will open a new issue for the actual underlying bug here (that
requirements aren't being handled correctly based on the stable/devel
spec used at installation time).

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