Revert "Cache query plan for DML LINQ queries (#2229)"

This reverts commit 8c7444d

Author: bahusoid

src/NHibernate/Linq/NhLinqExpression.cs

@@ -88,16 +88,13 @@ public IASTNode Translate(ISessionFactoryImplementor sessionFactory, bool filter
 
 			ParameterDescriptors = requiredHqlParameters.AsReadOnly();
 
-			if (QueryMode == QueryMode.Select && CanCachePlan)
-			{
-				CanCachePlan =
-					// If some constants do not have matching HQL parameters, their values from first query will
-					// be embedded in the plan and reused for subsequent queries: do not cache the plan.
-					!ParameterValuesByName
+			CanCachePlan = CanCachePlan &&
+				// If some constants do not have matching HQL parameters, their values from first query will
+				// be embedded in the plan and reused for subsequent queries: do not cache the plan.
+				!ParameterValuesByName
 					.Keys
 					.Except(requiredHqlParameters.Select(p => p.Name))
 					.Any();
-			}
 
 			// The ast node may be altered by caller, duplicate it for preserving the original one.
 			return DuplicateTree(ExpressionToHqlTranslationResults.Statement.AstNode);