Revert "SERVER-27383 Balancer should skip dropped collections" (sp)

This reverts commit 865a2da42dc56ca77f32a07cac5b7130ed21d7d0.

2 files changed, 0 insertions, 12 deletions

diff --git a/src/mongo/db/s/balancer/balancer_chunk_selection_policy_impl.cpp b/src/mongo/db/s/balancer/balancer_chunk_selection_policy_impl.cpp
index 2dc66b905a2..487cd76739e 100644
--- a/src/mongo/db/s/balancer/balancer_chunk_selection_policy_impl.cpp
+++ b/src/mongo/db/s/balancer/balancer_chunk_selection_policy_impl.cpp
@@ -209,10 +209,6 @@ StatusWith<SplitInfoVector> BalancerChunkSelectionPolicyImpl::selectChunksToSpli
     SplitInfoVector splitCandidates;
 
     for (const auto& coll : collections) {
-        if (coll.getDropped()) {
-            continue;
-        }
-
         const NamespaceString nss(coll.getNs());
 
         auto candidatesStatus = _getSplitCandidatesForCollection(txn, nss, shardStats);
@@ -261,10 +257,6 @@ StatusWith<MigrateInfoVector> BalancerChunkSelectionPolicyImpl::selectChunksToMo
     MigrateInfoVector candidateChunks;
 
     for (const auto& coll : collections) {
-        if (coll.getDropped()) {
-            continue;
-        }
-
         const NamespaceString nss(coll.getNs());
 
         if (!coll.getAllowBalance()) {
diff --git a/src/mongo/s/catalog/type_collection.h b/src/mongo/s/catalog/type_collection.h
index 06c51be3b55..f86edf46066 100644
--- a/src/mongo/s/catalog/type_collection.h
+++ b/src/mongo/s/catalog/type_collection.h
@@ -61,10 +61,6 @@ public:
 
     /**
      * Constructs a new DatabaseType object from BSON. Also does validation of the contents.
-     *
-     * Dropped collections accumulate in the collections list, through 3.6, so that
-     * mongos <= 3.4.x, when it retrieves the list from the config server, can delete its
-     * cache entries for dropped collections.  See SERVER-27475, SERVER-27474
      */
     static StatusWith<CollectionType> fromBSON(const BSONObj& source);