quest(m1): drop the retired TS import shared shift

quest/m1/README.md

@@ -46,7 +46,6 @@ QUIC studies there on that rule.
 - [Catalog estimate rate](/quest/m1/catalog-estimate-rate.md) - a rising `jitter`/`delay` estimate republishes the catalog at most once a second, in js/publish and moq-mux
 - [Legacy end overshoot](/quest/m1/legacy-end-overshoot.md) - browser playback survives a group that starts inside the previous group's estimated end
 - [Wire compatibility](/quest/m1/wire-compat.md) - a nightly run tests this checkout against the last published release for tokens, session wire, and catalog/container
-- [TS import shared shift](/quest/m1/ts-import-shared-shift.md) - unflagged loop wraps move audio and video by one shift, so A/V sync holds across wraps
 - [TS PSI reassembly](/quest/m1/ts-psi-reassembly.md) - `import ts` reads a PAT or PMT that spans packets or follows a nonzero pointer_field instead of aborting, and one corrupted section costs a repetition and a counted `CRC_error`, not the import
 - [RTMP interleaving](/quest/m1/rtmp-interleaving.md) - isolate partial messages before optimizing assembly copies
 - [TS stats module](/quest/m1/ts-stats-module.md) - on dev, the TS stats types move under `ts::stats` as `Snapshot` and `Stream`, with an owned `track`