Revert downstream "Fix fatal in phab calendar"
Revert rPHABd7744d7e9bd05d3117b1a128a95231a8ee148b5e superseded by upstream rPHABdc558b5538cd9c4872eacbfa5ca108f1c6e4f40d (which also brings a small performance improvement).
Bug: T341799
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Revert rPHABd7744d7e9bd05d3117b1a128a95231a8ee148b5e superseded by upstream rPHABdc558b5538cd9c4872eacbfa5ca108f1c6e4f40d (which also brings a small performance improvement).
Bug: T341799