Revert "Merge pull request #276 from soundnRg/master"

This reverts commit 80e06c1, reversing
changes made to 88d966c.

Causing 800+ test failures.

Author: oskarb

src/NHibernate/Linq/Visitors/HqlGeneratorExpressionTreeVisitor.cs

@@ -7,7 +7,6 @@
 using NHibernate.Linq.Functions;
 using NHibernate.Param;
 using NHibernate.Util;
-using Remotion.Linq;
 using Remotion.Linq.Clauses.Expressions;
 using Remotion.Linq.Clauses.ResultOperators;
 
@@ -388,7 +387,7 @@ protected HqlTreeNode VisitConstantExpression(ConstantExpression expression)
 			{
 				System.Type t = expression.Value.GetType();
 
-				if (t.IsGenericType && typeof(QueryableBase<>).IsAssignableFrom(t))
+				if (t.IsGenericType && t.GetGenericTypeDefinition() == typeof (NhQueryable<>))
 				{
 					return _hqlTreeBuilder.Ident(t.GetGenericArguments()[0].FullName);
 				}
@@ -462,4 +461,4 @@ protected HqlTreeNode VisitNewArrayExpression(NewArrayExpression expression)
 			return _hqlTreeBuilder.ExpressionSubTreeHolder(expressionSubTree);
 		}
 	}
-}
+}