Fix duplicate Raider.IO tooltips on raid frames

[KogasaPls]

What does this PR do?

Raider.IO now matches group units by GUID upstream (RaiderIO/raiderio-addon#394), which resolves tooltip units directly. The manual ShowProfile call in EllesmereUI is no longer necessary and caused tooltips to render twice.

How was it tested?

Verified syntax with luac -p and checked diff against upstream Raider.IO tooltip resolution.

Checklist

• New settings default OFF (N/A, no new settings)
• Zero cost while disabled: no events registered, no polling, no hooks doing work, no frames built
• Cheap while enabled: event-driven (no polling, no timer-based logic, no per-frame allocations)
• No writes onto Blizzard-owned frames (weak-table pattern used); HookScript/hooksecurefunc only, never SetScript on Blizzard frames
• Tested in-game on live; no version gates or pre-Midnight APIs added