[Kokoro] Use default params

The default params for `generate` are reasonable. This should hopefully future-proof against breaking changes in the future.

app.py

@@ -449,15 +449,6 @@ OVERRIDE_INPUTS = {
     # StyleTTS 2 kokoro
     'hexgrad/kokoro': {
 		1: "af", #voice
-		2: None, #ps
-		3: 1, #speed
-		4: 0.5, #reduce_noise
-		5: 4000, #opening_cut
-		6: 2000, #closing_cut
-		7: 3000, #ease_in
-		8: 1000, #ease_out
-		9: 5000, #pad_before
-		10: 5000, #pad_after
     },
 
     # maskGCT (by amphion)