They removed the Interface-option and its associated cVar as far as I can tell, but you can hide it with this:
Code:
local f = CreateFrame("Frame", nil, UIParent)
f:RegisterEvent("ADDON_LOADED")
f:SetScript("OnEvent", function(self, event, name)
if name == "Blizzard_TimeManager" then
TimeManagerClockButton:Hide()
TimeManagerClockButton:SetScript("OnShow", function(self)
TimeManagerClockButton:Hide()
end)
end
end)
You have to register for ADDON_LOADED since TimeManagerClockButton doesn't exist until Blizzard_TimeManager is loaded.