I'm just wandering if it is possible not askin for a script.
game.StarterGui:SetCoreGuiEnabled(Enum.CoreGuiType.Health, false)
You can also do this with the playerlist(Leaderboard) ,the chat, the health and theirs a way you can remove them all with All. Check the Object browser for more help on your studio by going to RobloxStudio-->Help-->ObjectBrowser-->CoreGuiType