Static analysis fix: Removed unused variable.

(We don't care if closing the device fails anyhow).

src/audio/coreaudio/SDL_coreaudio.c

@@ -319,7 +319,6 @@ COREAUDIO_CloseDevice(_THIS)
 {
     if (this->hidden != NULL) {
         if (this->hidden->audioUnitOpened) {
-            OSStatus result = noErr;
             AURenderCallbackStruct callback;
             const AudioUnitElement output_bus = 0;
             const AudioUnitElement input_bus = 1;
@@ -331,14 +330,13 @@ COREAUDIO_CloseDevice(_THIS)
                  kAudioUnitScope_Input);
 
             /* stop processing the audio unit */
-            result = AudioOutputUnitStop(this->hidden->audioUnit);
+            AudioOutputUnitStop(this->hidden->audioUnit);
 
             /* Remove the input callback */
             SDL_memset(&callback, 0, sizeof(AURenderCallbackStruct));
-            result = AudioUnitSetProperty(this->hidden->audioUnit,
-                                          kAudioUnitProperty_SetRenderCallback,
-                                          scope, bus, &callback,
-                                          sizeof(callback));
+            AudioUnitSetProperty(this->hidden->audioUnit,
+                                 kAudioUnitProperty_SetRenderCallback,
+                                 scope, bus, &callback, sizeof(callback));
 
             #if MACOSX_COREAUDIO
             CloseComponent(this->hidden->audioUnit);