SERVER-46015 Cleanup Pipeline parsing for aggregation stages with child pipelines

1 files changed, 1 insertions, 13 deletions

diff --git a/src/mongo/db/pipeline/document_source_union_with.h b/src/mongo/db/pipeline/document_source_union_with.h
index 3225a1e6468..ade72532935 100644
--- a/src/mongo/db/pipeline/document_source_union_with.h
+++ b/src/mongo/db/pipeline/document_source_union_with.h
@@ -62,19 +62,7 @@ public:
 
     DocumentSourceUnionWith(const boost::intrusive_ptr<ExpressionContext>& expCtx,
                             std::unique_ptr<Pipeline, PipelineDeleter> pipeline)
-        : DocumentSource(kStageName, expCtx), _pipeline(std::move(pipeline)) {
-        if (_pipeline) {
-            const auto& sources = _pipeline->getSources();
-            auto it = std::find_if(sources.begin(), sources.end(), [](const auto& src) {
-                return !src->constraints().isAllowedInUnionPipeline();
-            });
-
-            uassert(31441,
-                    str::stream() << (*it)->getSourceName()
-                                  << " is not allowed within a $unionWith's sub-pipeline",
-                    it == sources.end());
-        }
-    }
+        : DocumentSource(kStageName, expCtx), _pipeline(std::move(pipeline)) {}
 
     const char* getSourceName() const final {
         return kStageName.rawData();