Remove standard spawn menu tabs from Garry's Mod. (VJ Base, included.)

gm_DestroyMenuTabs.lua

local TabsModified = false

local TabsToRemove = {
	["spawnmenu.category.dupes"] = 1,
	["spawnmenu.category.entities"] = 1,
	["spawnmenu.category.npcs"] = 1,
	["spawnmenu.category.postprocess"] = 1,
	["spawnmenu.category.saves"] = 1,
	["spawnmenu.category.vehicles"] = 1,
	["spawnmenu.category.weapons"] = 1,
	["VJ Base"] = 1,
	-- ["#spawnmenu.content_tab"] = 1,
}

local function DestroySpawnTabs()
	local GetCreationTabs = spawnmenu.GetCreationTabs
	local SpawnMenu = g_SpawnMenu.CreateMenu

	for k,_ in next, TabsToRemove do
		GetCreationTabs()['#'..k] = nil -- Check for both language,
		GetCreationTabs()[k] = nil      -- and literal definitions.
		for _,v in pairs( SpawnMenu.Items ) do
			if v.Tab:GetText() == k or v.Tab:GetText() == language.GetPhrase(k) then
				SpawnMenu:CloseTab( v.Tab, true ) -- Due to some wierd gmod magic, the above sometimes doesn't work and vise vera.
			end                                       -- Including both for a higher chance of working.
		end
	end

	if not TabsModified then
		LocalPlayer():ConCommand('spawnmenu_reload')
		TabsModified = true
	end
end

hook.Add("PopulatePropMenu", "RemoveSpawnmenuTabs", DestroySpawnTabs)
LocalPlayer():ConCommand('spawnmenu_reload')

Where do I put this Tenshi?