1 files changed, 0 insertions, 7 deletions
diff --git a/src/mongo/db/pipeline/variables.h b/src/mongo/db/pipeline/variables.h
index d69d9d46831..d7a79c523b9 100644
--- a/src/mongo/db/pipeline/variables.h
+++ b/src/mongo/db/pipeline/variables.h
@@ -190,13 +190,6 @@ public:
         MONGO_UNREACHABLE_TASSERT(5858104);
     }
 
-    /**
-     * Return true if the passed-in variable ID belongs to a builtin variable.
-     */
-    static auto isBuiltin(Variables::Id variable) {
-        return kIdToBuiltinVarName.find(variable) != kIdToBuiltinVarName.end();
-    }
-
 private:
     struct ValueAndState {
         ValueAndState() = default;