Revert "make status icons unshaded (#18974)"

This reverts commit 23ad53c1e0.

Content.Client/StatusIcon/StatusIconOverlay.cs

@@ -4,19 +4,16 @@ using Robust.Client.GameObjects;
 using Robust.Client.Graphics;
 using Robust.Shared.Enums;
 using System.Numerics;
-using Robust.Shared.Prototypes;
 
 namespace Content.Client.StatusIcon;
 
 public sealed class StatusIconOverlay : Overlay
 {
     [Dependency] private readonly IEntityManager _entity = default!;
-    [Dependency] private readonly IPrototypeManager _prototype = default!;
 
     private readonly SpriteSystem _sprite;
     private readonly TransformSystem _transform;
     private readonly StatusIconSystem _statusIcon;
-    private readonly ShaderInstance _shader;
 
     public override OverlaySpace Space => OverlaySpace.WorldSpaceBelowFOV;
 
@@ -27,7 +24,6 @@ public sealed class StatusIconOverlay : Overlay
         _sprite = _entity.System<SpriteSystem>();
         _transform = _entity.System<TransformSystem>();
         _statusIcon = _entity.System<StatusIconSystem>();
-        _shader = _prototype.Index<ShaderPrototype>("unshaded").Instance();
     }
 
     protected override void Draw(in OverlayDrawArgs args)
@@ -40,8 +36,6 @@ public sealed class StatusIconOverlay : Overlay
         var scaleMatrix = Matrix3.CreateScale(new Vector2(1, 1));
         var rotationMatrix = Matrix3.CreateRotation(-eyeRot);
 
-        handle.UseShader(_shader);
-
         var query = _entity.AllEntityQueryEnumerator<StatusIconComponent, SpriteComponent, TransformComponent, MetaDataComponent>();
         while (query.MoveNext(out var uid, out var comp, out var sprite, out var xform, out var meta))
         {
@@ -105,7 +99,5 @@ public sealed class StatusIconOverlay : Overlay
                 handle.DrawTexture(texture, position);
             }
         }
-
-        handle.UseShader(null);
     }
 }