Remove deprecated and unused Ableton automation parameters and simplify playback state logic

tests/ableton-playback.test.ts

@@ -8,23 +8,20 @@ test('exports every EP playback mode as automatic One-Shot Trigger playback', ()
     voices: 5,
     retrigger: false,
     portamentoMode: 0,
-    useOneShotEnvelope: false,
   });
   assert.deepEqual(getSimplerPlaybackState('legato'), {
     playbackMode: 1,
     voices: 0,
     retrigger: false,
     portamentoMode: 2,
-    useOneShotEnvelope: false,
   });
 });
 
-test('preserves native EP ONE envelope translation', () => {
+test('preserves native EP ONE trigger behavior', () => {
   assert.deepEqual(getSimplerPlaybackState('oneshot'), {
     playbackMode: 1,
     voices: 0,
     retrigger: true,
     portamentoMode: 0,
-    useOneShotEnvelope: true,
   });
 });