Revert "Patcher README: bpmhalfdouble"

This reverts commit 8fa91f6c65.

README.md

@@ -67,7 +67,6 @@ From the emulator checkout `../CDJ900NXSVirtual` (`--repo` for another place):
 | `cuenames` | the rekordbox comment of the next cue in the title bar, in its colour (needs `cuecolours`) |
 | `played` | tracks loaded since power-on green in BROWSE; with modded players on Pro DJ Link theirs too |
 | `endwarn` | the bar under the overview blinks red in the last 30 seconds |
-| `bpmhalfdouble` | TAG TRACK held + CALL < / > halves or doubles the track's BPM and beat grid, kept on the USB (needs `quicksearch`) |
 | `wide_waveform` | the big waveform to the right edge; the ZOOM/GRID wheel replaced by a small ZOOM / GRID box |
 | `credit` | the boot screen says "Pionaarr Mods <release>" where it said "Ver 1.31" (ticked at the start, can be unticked) |