Do not return unused fields in DetailedSong

app/src/main/kotlin/it/vfsfitvnm/vimusic/models/Song.kt

@@ -15,19 +15,6 @@ data class Song(
     val likedAt: Long? = null,
     val totalPlayTimeMs: Long = 0
 ) {
-    val formattedTotalPlayTime: String
-        get() {
-            val seconds = totalPlayTimeMs / 1000
-
-            val hours = seconds / 3600
-
-            return when {
-                hours == 0L -> "${seconds / 60}m"
-                hours < 24L -> "${hours}h"
-                else -> "${hours / 24}d"
-            }
-        }
-
     fun toggleLike(): Song {
         return copy(
             likedAt = if (likedAt == null) System.currentTimeMillis() else null