Updated preprocessor directives

LLama/Common/FixedSizeQueue.cs

@@ -48,8 +48,6 @@ namespace LLama.Common
             // in which case we'll have to check later
             if (data.TryGetNonEnumeratedCount(out var dataCount) && dataCount > size)
                 throw new ArgumentException($"The max size set for the quene is {size}, but got {dataCount} initial values.");
-#elif !NETSTANDARD2_0_OR_GREATER
-#error Target framework not supported!
 #endif
 
             // Size of "data" is unknown, copy it all into a list

LLama/Extensions/ListExtensions.cs

@@ -5,14 +5,12 @@ namespace LLama.Extensions
 {
     internal static class ListExtensions
     {
-#if NETSTANDARD2_0 || NETSTANDARD2_1
+#if !NET6_0_OR_GREATER
         public static void EnsureCapacity<T>(this List<T> list, int capacity)
         {
             if (list.Capacity < capacity)
                 list.Capacity = capacity;
         }
-#elif !NET6_0_OR_GREATER
-#error Target framework not supported!
 #endif
 
         public static void AddSpan<T>(this List<T> list, ReadOnlySpan<T> items)