Merged PR 10239: Commenting out a constant which is not used

Commenting out a constant which is not used

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#### AI-Generated Description
The pull request contains only one change: a line of code was removed from the file **LogMessages.cs**. The removed line was:

- `public const string IDX10815 = "IDX10815: Depth of JSON: '{0}' exceeds max depth of '{1}'.";`

This line defined a constant string for an error message related to JSON depth. The reason for removing this line is not clear from the pull request content.

src/Microsoft.IdentityModel.Tokens/LogMessages.cs

@@ -239,7 +239,7 @@ internal static class LogMessages
         public const string IDX10812 = "IDX10812: Unable to create a {0} from the properties found in the JsonWebKey: '{1}'.";
         public const string IDX10813 = "IDX10813: Unable to create a {0} from the properties found in the JsonWebKey: '{1}', Exception '{2}'.";
         public const string IDX10814 = "IDX10814: Unable to create a {0} from the properties found in the JsonWebKey: '{1}'. Missing: '{2}'.";
-        public const string IDX10815 = "IDX10815: Depth of JSON: '{0}' exceeds max depth of '{1}'.";
+        //public const string IDX10815 = "IDX10815: Depth of JSON: '{0}' exceeds max depth of '{1}'.";
         public const string IDX10816 = "IDX10816: Decompressing would result in a token with a size greater than allowed. Maximum size allowed: '{0}'.";
 
         // Base64UrlEncoding

test/Microsoft.IdentityModel.AotCompatibility.Tests/Microsoft.IdentityModel.AotCompatibility.Tests.csproj

@@ -5,6 +5,7 @@
   <PropertyGroup>
     <!-- This test only needs to run on .NET -->
     <TargetFrameworks>net6.0</TargetFrameworks>
+    <LangVersion>10</LangVersion>
   </PropertyGroup>
 
   <ItemGroup>