Stop naming specific commercial discs in the AACS and codec comments

The same scrub as the previous commit, over the files it did not reach:
the variant-MKB layout notes, the 2.1 segment index observations, the
PPS-revert regressions and the playlist-twin tiebreak.

Measurements keep their numbers — "a v70 `0x2d` body = 46_100*2 + 16"
is the useful part, and the title it came from never was.

src/disc/mod.rs

@@ -2221,8 +2221,8 @@ impl Disc {
             .then_with(|| b.size_bytes.cmp(&a.size_bytes))
             // Tiebreak for equal-size twins: longer duration, then richer audio —
             // the same feature authored as sibling playlists (a full-audio main
-            // vs an audio-reduced twin, e.g. Fight Club's 00800 [DTS-HD MA + 13
-            // tracks] vs 00004 [stereo AC-3 only]). Prefer lossless-multichannel.
+            // vs an audio-reduced twin: 00800 [DTS-HD MA + 13 tracks] vs
+            // 00004 [stereo AC-3 only]). Prefer lossless-multichannel.
             .then_with(|| b.duration_secs.total_cmp(&a.duration_secs))
             .then_with(|| Self::audio_richness(b).cmp(&Self::audio_richness(a)))
     }