Removes temporary changes for the Birthgay 2022 event, ending
approximately at 2022-05-23 0600Z. Changes:
- Double XP disabled.
- Lootboxes disabled.
- Three event awards given real descriptions and colors.
- Partyhats: restored to cakeday-only condition and tooltip.
- Header UI: balloons removed, text visibility outline removed,
journoid banner reverted, marseyjam as header icon.
- Birthgay banners: removed from template, moved to new storage dir.
Confetti, though remaining as a permanent award, has been temporarily
removed pending a less performance-intensive implementation and one
that doesn't require maintaining a third-party package in the codebase.
Snakes
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