dupx: retire to the boneyard
dupx: retire to the boneyard

GDB is a requirement, but GDB lives in the homebrew/dupes tap now,
so dupx cannot stay in core.

Closes Homebrew/homebrew#39332.

Signed-off-by: Mike McQuaid <a17fed27eaa842282862ff7c1b9c8395a26ac320@mikemcquaid.com>

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