1 files changed, 0 insertions, 22 deletions
diff --git a/src/mongo/db/pipeline/document_source_internal_unpack_bucket.cpp b/src/mongo/db/pipeline/document_source_internal_unpack_bucket.cpp
index f3a96903a8e..272d7a1a80c 100644
--- a/src/mongo/db/pipeline/document_source_internal_unpack_bucket.cpp
+++ b/src/mongo/db/pipeline/document_source_internal_unpack_bucket.cpp
@@ -53,7 +53,6 @@
 #include "mongo/db/pipeline/document_source_match.h"
 #include "mongo/db/pipeline/document_source_project.h"
 #include "mongo/db/pipeline/document_source_sample.h"
-#include "mongo/db/pipeline/document_source_sequential_document_cache.h"
 #include "mongo/db/pipeline/document_source_single_document_transformation.h"
 #include "mongo/db/pipeline/document_source_sort.h"
 #include "mongo/db/pipeline/expression_context.h"
@@ -981,15 +980,6 @@ bool DocumentSourceInternalUnpackBucket::optimizeLastpoint(Pipeline::SourceConta
         tryInsertBucketLevelSortAndGroup(AccumulatorDocumentsNeeded::kLastDocument);
 }
 
-// Find $sequentialDocumentCache in the rest of the pipeline.
-Pipeline::SourceContainer::iterator findSequentialDocumentCache(
-    Pipeline::SourceContainer::iterator start, Pipeline::SourceContainer::iterator end) {
-    while (start != end && !dynamic_cast<DocumentSourceSequentialDocumentCache*>(start->get())) {
-        start = std::next(start);
-    }
-    return start;
-}
-
 Pipeline::SourceContainer::iterator DocumentSourceInternalUnpackBucket::doOptimizeAt(
     Pipeline::SourceContainer::iterator itr, Pipeline::SourceContainer* container) {
     invariant(*itr == this);
@@ -1085,18 +1075,6 @@ Pipeline::SourceContainer::iterator DocumentSourceInternalUnpackBucket::doOptimi
         }
 
         Pipeline::optimizeEndOfPipeline(itr, container);
-
-        // $sequentialDocumentCache is full pipeline context aware. The call to
-        // optimizeEndOfPipeline above isolates part of the pipeline and $sequentialDocumentCache
-        // optimization applies incorrectly. The second call to
-        // $sequentialDocumentCache->optimizeAt() is no-op, so it has to be forced.
-        auto cache = findSequentialDocumentCache(std::next(itr), container->end());
-        if (cache != container->end()) {
-            auto cacheDocSource =
-                dynamic_cast<DocumentSourceSequentialDocumentCache*>(cache->get());
-            cacheDocSource->forceOptimizeAt(cache, container);
-        }
-
         if (std::next(itr) == container->end()) {
             return container->end();
         } else {