Revert "Add runtime shim for LambdaExpression.Compile(bool)" - it's no op in NetFX

This reverts commit 5c8ad16.

Author: bahusoid

src/NHibernate/Impl/LambdaExpressionExtensions.cs

@@ -1,26 +1,13 @@
 using System;
 using System.Linq.Expressions;
-using System.Reflection;
 
 namespace NHibernate.Impl
 {
 #if NET461
 	internal static class LambdaExpressionExtensions
 	{
-		//NET4.6.1 does not have this method exposed,
-		//however it might be available in runtime
-		private static readonly MethodInfo CompileWithPreference = typeof(LambdaExpression)
-			.GetMethod("Compile", new[] { typeof(bool) });
-
-		public static Delegate Compile(this LambdaExpression expression, bool preferInterpretation)
-		{
-			if (CompileWithPreference != null)
-			{
-				return (Delegate) CompileWithPreference.Invoke(expression, new object[] { preferInterpretation });
-			}
-
-			return expression.Compile(); //Concurrent Compile() call causes "Garbage Collector" suspend all threads too often
-		}
+		public static Delegate Compile(this LambdaExpression expression, bool preferInterpretation) =>
+		  expression.Compile(); //Concurrent Compile() call causes "Garbage Collector" suspend all threads too often
 	}
 #endif
 }