Fix the MOTHERLOAD of undetected issues that are now visible thanks to net6.0

osu.Game/Overlays/Profile/Sections/Ranks/DrawableProfileScore.cs

@@ -4,7 +4,6 @@
 #nullable disable
 
 using System;
-using System.Diagnostics;
 using System.Linq;
 using JetBrains.Annotations;
 using osu.Framework.Allocation;
@@ -269,8 +268,6 @@ namespace osu.Game.Overlays.Profile.Sections.Ranks
             {
                 var metadata = beatmapInfo.Metadata;
 
-                Debug.Assert(metadata != null);
-
                 return new Drawable[]
                 {
                     new OsuSpriteText