New Lua File Mention Patch 9.1.5 – Shadowlands PTR Soon?

Blizzard added a file today which references functions deprecated in Patch 9.1.5. Could a new PTR be coming soon?

The following information was added to the wowz Burning Crusade build 2.5.2.39757:

-- These are functions that were deprecated in 9.1.5, and will be removed in the next expansion.
-- Please upgrade to the updated APIs as soon as possible.

if not IsPublicBuild() then
return;
end

-- Tooltips have moved to use the NineSlicePanel interface.

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