diff --git a/osu.Game.Rulesets.Taiko/Difficulty/Preprocessing/Colour/TaikoColourDifficultyPreprocessor.cs b/osu.Game.Rulesets.Taiko/Difficulty/Preprocessing/Colour/TaikoColourDifficultyPreprocessor.cs
index 2b047a4336..38d51aef91 100644
--- a/osu.Game.Rulesets.Taiko/Difficulty/Preprocessing/Colour/TaikoColourDifficultyPreprocessor.cs
+++ b/osu.Game.Rulesets.Taiko/Difficulty/Preprocessing/Colour/TaikoColourDifficultyPreprocessor.cs
@@ -18,9 +18,8 @@ public static class TaikoColourDifficultyPreprocessor
         /// assigning the appropriate <see cref="TaikoDifficultyHitObjectColour"/>s to each <see cref="TaikoDifficultyHitObject"/>,
         /// and pre-evaluating colour difficulty of each <see cref="TaikoDifficultyHitObject"/>.
         /// </summary>
-        public static List<TaikoDifficultyHitObjectColour> ProcessAndAssign(List<DifficultyHitObject> hitObjects)
+        public static void ProcessAndAssign(List<DifficultyHitObject> hitObjects)
         {
-            List<TaikoDifficultyHitObjectColour> colours = new List<TaikoDifficultyHitObjectColour>();
             List<CoupledColourEncoding> encodings = encode(hitObjects);
 
             // Assign indexing and encoding data to all relevant objects. Only the first note of each encoding type is
@@ -48,8 +47,6 @@ public static List<TaikoDifficultyHitObjectColour> ProcessAndAssign(List<Difficu
                     }
                 }
             }
-
-            return colours;
         }
 
         /// <summary>
diff --git a/osu.Game.Rulesets.Taiko/Difficulty/Preprocessing/TaikoDifficultyPreprocessor.cs b/osu.Game.Rulesets.Taiko/Difficulty/Preprocessing/TaikoDifficultyPreprocessor.cs
deleted file mode 100644
index 2223c8e2d1..0000000000
--- a/osu.Game.Rulesets.Taiko/Difficulty/Preprocessing/TaikoDifficultyPreprocessor.cs
+++ /dev/null
@@ -1,21 +0,0 @@
-// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
-// See the LICENCE file in the repository root for full licence text.
-
-using System.Collections.Generic;
-using osu.Game.Rulesets.Difficulty.Preprocessing;
-using osu.Game.Rulesets.Taiko.Difficulty.Preprocessing.Colour;
-
-namespace osu.Game.Rulesets.Taiko.Difficulty.Preprocessing
-{
-    public static class TaikoDifficultyPreprocessor
-    {
-        /// <summary>
-        /// Does preprocessing on a list of <see cref="TaikoDifficultyHitObject"/>s.
-        /// </summary>
-        public static List<DifficultyHitObject> Process(List<DifficultyHitObject> difficultyHitObjects)
-        {
-            TaikoColourDifficultyPreprocessor.ProcessAndAssign(difficultyHitObjects);
-            return difficultyHitObjects;
-        }
-    }
-}
diff --git a/osu.Game.Rulesets.Taiko/Difficulty/TaikoDifficultyCalculator.cs b/osu.Game.Rulesets.Taiko/Difficulty/TaikoDifficultyCalculator.cs
index ceaa3c56b5..ea2f04a3d9 100644
--- a/osu.Game.Rulesets.Taiko/Difficulty/TaikoDifficultyCalculator.cs
+++ b/osu.Game.Rulesets.Taiko/Difficulty/TaikoDifficultyCalculator.cs
@@ -13,6 +13,7 @@
 using osu.Game.Rulesets.Mods;
 using osu.Game.Rulesets.Scoring;
 using osu.Game.Rulesets.Taiko.Difficulty.Preprocessing;
+using osu.Game.Rulesets.Taiko.Difficulty.Preprocessing.Colour;
 using osu.Game.Rulesets.Taiko.Difficulty.Skills;
 using osu.Game.Rulesets.Taiko.Mods;
 using osu.Game.Rulesets.Taiko.Objects;
@@ -63,7 +64,9 @@ protected override IEnumerable<DifficultyHitObject> CreateDifficultyHitObjects(I
                 );
             }
 
-            return TaikoDifficultyPreprocessor.Process(difficultyHitObjects);
+            TaikoColourDifficultyPreprocessor.ProcessAndAssign(difficultyHitObjects);
+
+            return difficultyHitObjects;
         }
 
         protected override DifficultyAttributes CreateDifficultyAttributes(IBeatmap beatmap, Mod[] mods, Skill[] skills, double clockRate)