src/api.c: Remove spec of num_voices and synth_flags for default MIDI10.

[dpwe]

No description provided.

[bwhitman]

⛓️ tulipcc integration PR opened

This merge was pinned into tulipcc for full-system CI: shorepine/tulipcc#1233

Test it there and merge that PR to move tulipcc onto this AMY.

[github-actions]

🎛️ AMY HW CI (AMYboard bench)

Flashed this PR's AMY (LoadTestChord: 6-voice Juno patch=1, one held note every 2 s) onto the physical AMYboard and measured the smoothed render load as the chord grows — back-to-back with the same sketch built at the PR's merge base, so Δ is this PR's own cost.

✅ PASS — the bench ran the test to completion.

notes held	main @ 8bc9871	this PR	Δ
1	1381	1380	-1
2	1546	1546	+0
3	2134	2133	-1
4	2322	2322	+0
5	2975	2969	-6
6	3171	3171	+0

Full chord settled render μs: 3172 (was 3173, Δ -0.0%) (peak 3179, 39 samples)

⬇️ Artifacts: serial log · load trace · report

_{Self-hosted bench (amyboardci). FAIL means only that the test could not run — the load values are informational, with no threshold and no audio compare. See tools/arduino_loadsweep/.}