Remove [Pure] annotations.

Author: kevzhao2

src/Orion.Launcher/Entities/OrionEntity.cs

@@ -17,7 +17,6 @@
 
 using System.Diagnostics;
 using System.Diagnostics.CodeAnalysis;
-using System.Diagnostics.Contracts;
 using Orion.Core.Entities;
 using Orion.Core.Utils;
 using Orion.Launcher.Utils;
@@ -66,7 +65,7 @@ public Vector2f Size
 
         public TTerrariaEntity Wrapped { get; }
 
-        [Pure, ExcludeFromCodeCoverage]
+        [ExcludeFromCodeCoverage]
         public override string ToString() => this.IsConcrete() ? $"<{Name} (index: {Index})>" : "<abstract instance>";
     }
 }

src/Orion.Launcher/Utils/SpanExtensions.cs

@@ -17,7 +17,6 @@
 
 using System;
 using System.Diagnostics;
-using System.Diagnostics.Contracts;
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 
@@ -36,7 +35,7 @@ internal static class SpanExtensions
         /// <param name="span">The span.</param>
         /// <param name="index">The index.</param>
         /// <returns>A reference to the element at the given <paramref name="index"/>.</returns>
-        [Pure, MethodImpl(MethodImplOptions.AggressiveInlining)]
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static ref T At<T>(this Span<T> span, int index)
         {
             Debug.Assert(index >= 0 && index < span.Length);

src/Orion.Launcher/World/TileEntities/OrionChest.cs

@@ -17,7 +17,6 @@
 
 using System;
 using System.Diagnostics.CodeAnalysis;
-using System.Diagnostics.Contracts;
 using Destructurama.Attributed;
 using Orion.Core.Entities;
 using Orion.Core.Items;
@@ -68,7 +67,7 @@ public int Y
 
         public Terraria.Chest Wrapped { get; }
 
-        [Pure, ExcludeFromCodeCoverage]
+        [ExcludeFromCodeCoverage]
         public override string ToString() => this.IsConcrete() ? $"<(index: {Index})>" : "<abstract instance>";
     }
 }

src/Orion.Launcher/World/TileEntities/OrionSign.cs

@@ -17,7 +17,6 @@
 
 using System;
 using System.Diagnostics.CodeAnalysis;
-using System.Diagnostics.Contracts;
 using Destructurama.Attributed;
 using Orion.Core.Entities;
 using Orion.Core.World.TileEntities;
@@ -63,7 +62,7 @@ public int Y
 
         public Terraria.Sign Wrapped { get; }
 
-        [Pure, ExcludeFromCodeCoverage]
+        [ExcludeFromCodeCoverage]
         public override string ToString() => this.IsConcrete() ? $"<(index: {Index})>" : "<abstract instance>";
     }
 }