Removed extra enum in videoplayer sample (#4571)

kotlin-native/samples/videoplayer/src/videoPlayerMain/kotlin/VideoPlayer.kt

@@ -156,17 +156,11 @@ class VideoPlayer(val requestedSize: Dimensions?) : DisposableContainer() {
     }
 }
 
-enum class Mode {
-    VIDEO,
-    AUDIO,
-    BOTH
-}
-
 fun main(args: Array<String>) {
     val argParser = ArgParser("videoplayer")
     val mode by argParser.option(
-            ArgType.Choice<Mode>(), shortName = "m", description = "Play mode")
-            .default(Mode.BOTH)
+            ArgType.Choice<PlayMode>(), shortName = "m", description = "Play mode")
+            .default(PlayMode.BOTH)
     val size by argParser.option(ArgType.Int, shortName = "s", description = "Required size of videoplayer window")
             .delimiter(",")
     val fileName by argParser.argument(ArgType.String, description = "File to play")
@@ -181,7 +175,7 @@ fun main(args: Array<String>) {
         Dimensions(size[0], size[1])
     val player = VideoPlayer(requestedSize)
     try {
-        player.playFile(fileName, PlayMode.valueOf(mode.toUpperCase()))
+        player.playFile(fileName, mode)
     } finally {
         player.dispose()
     }