formula: improve dependencies hash output.
formula: improve dependencies hash output.

It doesn't really make any sense for the `dependencies` hash to include
all optional, recommended and build dependencies when these are already
separately output.

vitorgalvao/brew,vitorgalvao/brew,Linuxbrew/brew,mgrimes/brew,nandub/brew,Homebrew/brew,mahori/brew,ilovezfs/brew,konqui/brew,Linuxbrew/brew,ilovezfs/brew,maxim-belkin/brew,vitorgalvao/brew,JCount/brew,konqui/brew,DomT4/brew,nandub/brew,JCount/brew,maxim-belkin/brew,Linuxbrew/brew,sjackman/homebrew,mahori/brew,MikeMcQuaid/brew,nandub/brew,EricFromCanada/brew,mahori/brew,nandub/brew,DomT4/brew,claui/brew,sjackman/homebrew,EricFromCanada/brew,mahori/brew,MikeMcQuaid/brew,DomT4/brew,Homebrew/brew,JCount/brew,claui/brew,MikeMcQuaid/brew,Homebrew/brew,reitermarkus/brew,sjackman/homebrew,MikeMcQuaid/brew,claui/brew,reitermarkus/brew,reitermarkus/brew,reitermarkus/brew,ilovezfs/brew,EricFromCanada/brew,konqui/brew,DomT4/brew,EricFromCanada/brew,mgrimes/brew,maxim-belkin/brew,vitorgalvao/brew,Homebrew/brew,mgrimes/brew,JCount/brew,claui/brew,Linuxbrew/brew,sjackman/homebrew,konqui/brew