Revert "SERVER-9516 Write version document to admin.system.version as needed in mongod."

This reverts commit 3d61067308f7f526ec00d79bcbb158d31fd413fa, which breaks multi-version
because it replicates writes to admin.system.version at startup.

1 files changed, 2 insertions, 33 deletions

diff --git a/src/mongo/db/auth/authz_manager_external_state_d.cpp b/src/mongo/db/auth/authz_manager_external_state_d.cpp
index 808ea32ba04..99c61c95fb4 100644
--- a/src/mongo/db/auth/authz_manager_external_state_d.cpp
+++ b/src/mongo/db/auth/authz_manager_external_state_d.cpp
@@ -108,45 +108,14 @@ namespace {
     }
 }  // namespace
 
-    void AuthzManagerExternalStateMongod::writeAuthSchemaVersionDocumentIfNeeded() {
-        Client::WriteContext ctx(AuthorizationManager::versionCollectionNamespace.ns());
-        BSONObj ignored;
-        if (Helpers::findOne(AuthorizationManager::versionCollectionNamespace.ns(),
-                             AuthorizationManager::versionDocumentQuery,
-                             ignored)) {
-            return;
-        }
-
-        const bool hasPrivDocs = Helpers::findOne(
-                AuthorizationManager::usersCollectionNamespace.ns(), BSONObj(), ignored);
-        const int version = hasPrivDocs ?
-            AuthorizationManager::schemaVersion24 :
-            AuthorizationManager::schemaVersion26Final;
-
-        DBDirectClient client;
-        BSONObjBuilder versionDocBuilder;
-        versionDocBuilder.appendElements(AuthorizationManager::versionDocumentQuery);
-        versionDocBuilder.append(AuthorizationManager::schemaVersionFieldName, version);
-        BSONObj versionDoc = versionDocBuilder.done();
-        client.insert(AuthorizationManager::versionCollectionNamespace.ns(), versionDoc);
-        std::string err = client.getLastError(
-                AuthorizationManager::versionCollectionNamespace.db().toString());
-        if (!err.empty()) {
-            warning() << "Failed to write auth schema version document " << versionDoc <<
-                " to " << AuthorizationManager::versionCollectionNamespace.ns() << ": " <<
-                err;
-        }
-    }
-
     Status AuthzManagerExternalStateMongod::getStoredAuthorizationVersion(int* outVersion) {
         {
             Client::ReadContext ctx(AuthorizationManager::versionCollectionNamespace.ns());
             BSONObj versionDoc;
             if (Helpers::findOne(AuthorizationManager::versionCollectionNamespace.ns(),
-                                 AuthorizationManager::versionDocumentQuery,
+                                 BSON("_id" << 1),
                                  versionDoc)) {
-                BSONElement versionElement = versionDoc[
-                        AuthorizationManager::schemaVersionFieldName];
+                BSONElement versionElement = versionDoc["currentVersion"];
                 if (versionElement.isNumber()) {
                     *outVersion = versionElement.numberInt();
                     return Status::OK();