Remove needless API extensions:

AggregatingGroupByRewriter.cs: Restore private constructor lost in a5c0c6b (class is static on the master branch).
NhRelinqQueryParser.cs: Make classes added after 3.3.2 internal.
ResultOperatorProcessors/ProcessTimeout.cs: Added after 3.3.2, make it internal.

Author: oskarb

src/NHibernate/Linq/GroupBy/AggregatingGroupByRewriter.cs

@@ -29,6 +29,8 @@ namespace NHibernate.Linq.GroupBy
 	/// </summary>
 	public class AggregatingGroupByRewriter
 	{
+		private AggregatingGroupByRewriter() { }
+
 		private static readonly ICollection<System.Type> AcceptableOuterResultOperators = new HashSet<System.Type>
 			{
 				typeof (SkipResultOperator),

src/NHibernate/Linq/NhRelinqQueryParser.cs

@@ -168,7 +168,7 @@ public override void TransformExpressions(Func<Expression, Expression> transform
 	}
 
 
-	public class TimeoutExpressionNode : ResultOperatorExpressionNodeBase
+	internal class TimeoutExpressionNode : ResultOperatorExpressionNodeBase
 	{
 		private readonly MethodCallExpressionParseInfo _parseInfo;
 		private readonly ConstantExpression _timeout;
@@ -191,7 +191,7 @@ protected override ResultOperatorBase CreateResultOperator(ClauseGenerationConte
 		}
 	}
 
-	public class TimeoutResultOperator : ResultOperatorBase
+	internal class TimeoutResultOperator : ResultOperatorBase
 	{
 		public MethodCallExpressionParseInfo ParseInfo { get; private set; }
 		public ConstantExpression Timeout { get; private set; }

src/NHibernate/Linq/Visitors/ResultOperatorProcessors/ProcessTimeout.cs

@@ -1,7 +1,7 @@
 
 namespace NHibernate.Linq.Visitors.ResultOperatorProcessors
 {
-    public class ProcessTimeout : IResultOperatorProcessor<TimeoutResultOperator>
+    internal class ProcessTimeout : IResultOperatorProcessor<TimeoutResultOperator>
     {
         public void Process(TimeoutResultOperator resultOperator, QueryModelVisitor queryModelVisitor, IntermediateHqlTree tree)
         {