oto: stop suspending and resuming when the machine is slept on macOS

This logic was introduced for hajimehoshi/ebiten#1259, but now this
seems no longer needed. Rather, this logic caused unexpected resuming.

Updates hajimehoshi/ebiten#3297

Author: hajimehoshi

driver_darwin.go

@@ -21,8 +21,6 @@ import (
 	"time"
 	"unsafe"
 
-	"github.com/ebitengine/purego/objc"
-
 	"github.com/ebitengine/oto/v3/internal/mux"
 )
 
@@ -140,11 +138,6 @@ func newContext(sampleRate int, channelCount int, format mux.Format, bufferSizeI
 		c.audioQueue = q
 		c.unqueuedBuffers = bs
 
-		if err := setNotificationHandler(); err != nil {
-			c.err.TryStore(err)
-			return
-		}
-
 		var retryCount int
 	try:
 		if osstatus := _AudioQueueStart(c.audioQueue, nil); osstatus != noErr {
@@ -292,14 +285,6 @@ func render(inUserData unsafe.Pointer, inAQ _AudioQueueRef, inBuffer _AudioQueue
 	theContext.cond.Signal()
 }
 
-func setGlobalPause(self objc.ID, _cmd objc.SEL, notification objc.ID) {
-	theContext.Suspend()
-}
-
-func setGlobalResume(self objc.ID, _cmd objc.SEL, notification objc.ID) {
-	theContext.Resume()
-}
-
 func sleepTime(count int) time.Duration {
 	switch count {
 	case 0: