Remove extra checks for known types in log formatter (#89000)

Turns out the JIT will not box in tier 1, this was trying to optimize tier 0 code.

src/libraries/Microsoft.Extensions.Logging.Abstractions/src/LogValuesFormatter.cs

@@ -265,13 +265,6 @@ private static object FormatArgument(object? value)
 
         private static bool TryFormatArgumentIfNullOrEnumerable<T>(T? value, [NotNullWhen(true)] ref object? stringValue)
         {
-            // Avoiding boxing of known types
-            if (typeof(T).IsPrimitive || typeof(T).IsEnum)
-            {
-                stringValue = null;
-                return false;
-            }
-
             if (value == null)
             {
                 stringValue = NullValue;