Remove redundant compilation conditionals

Author: bkoelman

src/JsonApiDotNetCore/Serialization/Response/FingerprintGenerator.cs

@@ -6,11 +6,7 @@ namespace JsonApiDotNetCore.Serialization.Response;
 /// <inheritdoc cref="IFingerprintGenerator" />
 internal sealed class FingerprintGenerator : IFingerprintGenerator
 {
-#if NET6_0
-    private static readonly byte[] Separator = Encoding.UTF8.GetBytes("|");
-#else
     private static readonly byte[] Separator = "|"u8.ToArray();
-#endif
     private static readonly uint[] LookupTable = Enumerable.Range(0, 256).Select(ToLookupEntry).ToArray();
 
     private static uint ToLookupEntry(int index)

test/NoEntityFrameworkTests/NullSafeExpressionRewriterTests.cs

@@ -498,11 +498,7 @@ public void Can_rewrite_order_by_clause_with_IntPtr()
                 Parent = new TestResource
                 {
                     Id = generator.GetNext(),
-#if NET6_0
-                    Pointer = (IntPtr)1
-#else
-                    Pointer = 1
-#endif
+                    Pointer = (nint)1
                 }
             }
         };