Clean up WeakAuras table and remove members that no one should touch

WeakAurasOptions/DisplayOptions.lua

@@ -1,7 +1,6 @@
 if not WeakAuras.IsLibsOK() then return end
 local AddonName, OptionsPrivate = ...
 local L = WeakAuras.L
-local regionOptions = WeakAuras.regionOptions
 
 local flattenRegionOptions = OptionsPrivate.commonOptions.flattenRegionOptions
 local fixMetaOrders = OptionsPrivate.commonOptions.fixMetaOrders
@@ -90,8 +89,8 @@ function OptionsPrivate.GetDisplayOptions(data)
 
     local hasSubElements = false
 
-    if(regionOptions[data.regionType]) then
-      regionOption = regionOptions[data.regionType].create(id, data);
+    if(OptionsPrivate.Private.regionOptions[data.regionType]) then
+      regionOption = OptionsPrivate.Private.regionOptions[data.regionType].create(id, data);
 
       if data.subRegions then
         local subIndex = {}
@@ -210,8 +209,8 @@ function OptionsPrivate.GetDisplayOptions(data)
     for child in OptionsPrivate.Private.TraverseLeafs(data) do
       if child and not handledRegionTypes[child.regionType] then
         handledRegionTypes[child.regionType] = true;
-        if regionOptions[child.regionType] then
-          allOptions = union(allOptions, regionOptions[child.regionType].create(id, data));
+        if OptionsPrivate.Private.regionOptions[child.regionType] then
+          allOptions = union(allOptions, OptionsPrivate.Private.regionOptions[child.regionType].create(id, data));
         else
           unsupportedCount = unsupportedCount + 1
           allOptions["__unsupported" .. unsupportedCount] =  {