[Cleanup] Move Zones to a basic require structure

I was trying to use a scoped require, which the tooling didn't like and 
TTS doesn't respect anyway.  Removed the extra structure and changed the 
require() to a simple one.

src/arkhamdb/DeckImporterMain.ttslua

@@ -1,4 +1,4 @@
-local Zones = require("playermat/Zones")
+require("playermat/Zones")
 require("arkhamdb/LoaderUi")
 
 local bondedList = { }

src/playermat/Zones.ttslua

@@ -19,8 +19,6 @@
 -- SetAside4: Upgrade sheets for customizable cards
 -- SetAside5: Hunch Deck for Joe Diamond
 -- SetAside6: currently unused
-do
-
 local playerMatGuids     = {}
 playerMatGuids["Red"]    = "0840d5"
 playerMatGuids["Orange"] = "bd0ff4"
@@ -139,6 +137,3 @@ do
 
   return deckRotation
 end
-
-  return Zones
-end