diff --git a/osu.Game/Extensions/TimeDisplayExtensions.cs b/osu.Game/Extensions/EditorDisplayExtensions.cs
similarity index 77%
rename from osu.Game/Extensions/TimeDisplayExtensions.cs
rename to osu.Game/Extensions/EditorDisplayExtensions.cs
index dacde44ca1..f749b88b46 100644
--- a/osu.Game/Extensions/TimeDisplayExtensions.cs
+++ b/osu.Game/Extensions/EditorDisplayExtensions.cs
@@ -22,11 +22,5 @@ namespace osu.Game.Extensions
         /// <returns>An editor formatted display string.</returns>
         public static string ToEditorFormattedString(this TimeSpan timeSpan) =>
             $"{(timeSpan < TimeSpan.Zero ? "-" : string.Empty)}{timeSpan:mm\\:ss\\:fff}";
-
-        public static string ToFormattedDuration(this double milliseconds) =>
-            ToFormattedDuration(TimeSpan.FromMilliseconds(milliseconds));
-
-        public static string ToFormattedDuration(this TimeSpan timeSpan) =>
-            timeSpan.Hours == 0 ? $"{timeSpan:mm\\:ss}" : $"{timeSpan:HH\\:mm\\:ss}";
     }
 }