README: remove `brew server`.
README: remove `brew server`.

alyssais/brew,claui/brew,tonyg/homebrew,JCount/brew,reelsense/brew,ilovezfs/brew,EricFromCanada/brew,MikeMcQuaid/brew,EricFromCanada/brew,AnastasiaSulyagina/brew,MikeMcQuaid/brew,jmsundar/brew,amar-laksh/brew_sudo,sjackman/homebrew,muellermartin/dist,mistydemeo/homebrew,Linuxbrew/brew,Homebrew/brew,Homebrew/brew,nandub/brew,maxim-belkin/brew,zmwangx/brew,zmwangx/brew,sjackman/homebrew,reitermarkus/brew,Homebrew/brew,reitermarkus/brew,mahori/brew,nandub/brew,EricFromCanada/brew,reelsense/brew,sjackman/homebrew,JCount/brew,claui/brew,mistydemeo/homebrew,JCount/brew,mahori/brew,bfontaine/brew,hanxue/linuxbrew,mahori/brew,palxex/brew,konqui/brew,konqui/brew,mgrimes/brew,aw1621107/brew,pseudocody/brew,staticfloat/brew,aw1621107/brew,pseudocody/brew,konqui/brew,vitorgalvao/brew,gregory-nisbet/brew,bfontaine/brew,sjackman/homebrew,vitorgalvao/brew,vitorgalvao/brew,gregory-nisbet/brew,alyssais/brew,rwhogg/brew,ilovezfs/brew,gordonmcshane/homebrew,claui/brew,toonetown/homebrew,toonetown/homebrew,reelsense/brew,tonyg/homebrew,DomT4/brew,EricFromCanada/brew,konqui/brew,bfontaine/brew,mistydemeo/homebrew,nandub/brew,DomT4/brew,muellermartin/dist,tonyg/homebrew,gordonmcshane/homebrew,rwhogg/brew,vitorgalvao/brew,muellermartin/dist,MikeMcQuaid/brew,pseudocody/brew,aw1621107/brew,toonetown/homebrew,DomT4/brew,reitermarkus/brew,palxex/brew,mgrimes/brew,maxim-belkin/brew,Linuxbrew/brew,JCount/brew,DomT4/brew,staticfloat/brew,gordonmcshane/homebrew,nandub/brew,alyssais/brew,claui/brew,gregory-nisbet/brew,Homebrew/brew,hanxue/linuxbrew,hanxue/linuxbrew,mahori/brew,AnastasiaSulyagina/brew,ilovezfs/brew,Linuxbrew/brew,AnastasiaSulyagina/brew,Linuxbrew/brew,jmsundar/brew,palxex/brew,amar-laksh/brew_sudo,staticfloat/brew,MikeMcQuaid/brew,mgrimes/brew,reitermarkus/brew,rwhogg/brew,maxim-belkin/brew,jmsundar/brew,amar-laksh/brew_sudo,zmwangx/brew