diff --git a/src/libs/qmljs/qmljsmodelmanagerinterface.cpp b/src/libs/qmljs/qmljsmodelmanagerinterface.cpp
index 688199b37ad..8e5e74700e4 100644
--- a/src/libs/qmljs/qmljsmodelmanagerinterface.cpp
+++ b/src/libs/qmljs/qmljsmodelmanagerinterface.cpp
@@ -664,12 +664,6 @@ QList<ModelManagerInterface::ProjectInfo> ModelManagerInterface::allProjectInfos
     return infos;
 }
 
-bool ModelManagerInterface::isIdle() const
-{
-    QMutexLocker futureLocker(&m_futuresMutex);
-    return m_futureSynchronizer.isEmpty();
-}
-
 void ModelManagerInterface::emitDocumentChangedOnDisk(Document::Ptr doc)
 {
     emit documentChangedOnDisk(std::move(doc));
diff --git a/src/libs/qmljs/qmljsmodelmanagerinterface.h b/src/libs/qmljs/qmljsmodelmanagerinterface.h
index a4b6be96c19..899f9d71245 100644
--- a/src/libs/qmljs/qmljsmodelmanagerinterface.h
+++ b/src/libs/qmljs/qmljsmodelmanagerinterface.h
@@ -161,7 +161,6 @@ public:
     void updateQrcFile(const QString &path);
     ProjectInfo projectInfoForPath(const QString &path) const;
     QList<ProjectInfo> allProjectInfosForPath(const QString &path) const;
-    bool isIdle() const ;
 
     QStringList importPathsNames() const;
     QmlJS::QmlLanguageBundles activeBundles() const;