Fixing some warnings (#6250)

Co-authored-by: Paul Ritter <ritter.paul1@googlemail.com>

Content.Benchmarks/DynamicTreeBenchmark.cs

@@ -1,4 +1,4 @@
-using BenchmarkDotNet.Attributes;
+using BenchmarkDotNet.Attributes;
 using Robust.Shared.Maths;
 using Robust.Shared.Physics;
 
@@ -7,7 +7,7 @@ namespace Content.Benchmarks
     [SimpleJob, MemoryDiagnoser]
     public class DynamicTreeBenchmark
     {
-        private static readonly Box2[] aabbs1 =
+        private static readonly Box2[] _aabbs1 =
         {
             ((Box2) default).Enlarged(1), //2x2 square
             ((Box2) default).Enlarged(2), //4x4 square
@@ -37,11 +37,11 @@ namespace Content.Benchmarks
         public void Setup()
         {
             _b2Tree = new B2DynamicTree<int>();
-            _tree = new DynamicTree<int>((in int value) => aabbs1[value], capacity: 16);
+            _tree = new DynamicTree<int>((in int value) => _aabbs1[value], capacity: 16);
 
-            for (var i = 0; i < aabbs1.Length; i++)
+            for (var i = 0; i < _aabbs1.Length; i++)
             {
-                var aabb = aabbs1[i];
+                var aabb = _aabbs1[i];
                 _b2Tree.CreateProxy(aabb, i);
                 _tree.Add(i);
             }