Revert "Micro-optimization to replace player.GetAll() with player.Iterator in the Invis hook think"

This reverts commit 5da463795d.

Turns out my non-beta dedicated server was actually on the beta branch

lua/ulib/server/player.lua

@@ -112,8 +112,9 @@ end
 
 
 local function doInvis()
+	local players = player.GetAll()
 	local remove = true
-	for _, player in player.Iterator() do
+	for _, player in ipairs( players ) do
 		local t = player:GetTable()
 		if t.invis then
 			remove = false

ulib.build

@@ -1 +1 @@
-1710039758
+1708618372