diff --git a/src/plugins/projectexplorer/extracompiler.cpp b/src/plugins/projectexplorer/extracompiler.cpp
index c76bcc41eb8..6dd653774ec 100644
--- a/src/plugins/projectexplorer/extracompiler.cpp
+++ b/src/plugins/projectexplorer/extracompiler.cpp
@@ -53,7 +53,7 @@ namespace ProjectExplorer {
 
 Q_GLOBAL_STATIC(QThreadPool, s_extraCompilerThreadPool);
 Q_GLOBAL_STATIC(QList<ExtraCompilerFactory *>, factories);
-Q_GLOBAL_STATIC(QVector<ExtraCompilerFactoryObserver *>, observers);
+
 class ExtraCompilerPrivate
 {
 public:
@@ -322,14 +322,6 @@ ExtraCompilerFactory::~ExtraCompilerFactory()
     factories->removeAll(this);
 }
 
-void ExtraCompilerFactory::annouceCreation(const Project *project,
-                                           const Utils::FilePath &source,
-                                           const Utils::FilePaths &targets)
-{
-    for (ExtraCompilerFactoryObserver *observer : qAsConst(*observers))
-        observer->newExtraCompiler(project, source, targets);
-}
-
 QList<ExtraCompilerFactory *> ExtraCompilerFactory::extraCompilerFactories()
 {
     return *factories();
@@ -465,14 +457,4 @@ void ProcessExtraCompiler::cleanUp()
     setCompileTime(QDateTime::currentDateTime());
 }
 
-ExtraCompilerFactoryObserver::ExtraCompilerFactoryObserver()
-{
-    observers->push_back(this);
-}
-
-ExtraCompilerFactoryObserver::~ExtraCompilerFactoryObserver()
-{
-    observers->removeOne(this);
-}
-
 } // namespace ProjectExplorer
diff --git a/src/plugins/projectexplorer/extracompiler.h b/src/plugins/projectexplorer/extracompiler.h
index 884c1bf6830..5c0854a3b4b 100644
--- a/src/plugins/projectexplorer/extracompiler.h
+++ b/src/plugins/projectexplorer/extracompiler.h
@@ -143,20 +143,6 @@ private:
     QFutureWatcher<FileNameToContentsHash> *m_watcher = nullptr;
 };
 
-class PROJECTEXPLORER_EXPORT ExtraCompilerFactoryObserver
-{
-    friend class ExtraCompilerFactory;
-
-protected:
-    ExtraCompilerFactoryObserver();
-    ~ExtraCompilerFactoryObserver();
-
-    virtual void newExtraCompiler(const Project *project,
-                                  const Utils::FilePath &source,
-                                  const Utils::FilePaths &targets)
-        = 0;
-};
-
 class PROJECTEXPLORER_EXPORT ExtraCompilerFactory : public QObject
 {
     Q_OBJECT
@@ -172,10 +158,6 @@ public:
                                   const Utils::FilePaths &targets)
         = 0;
 
-    void annouceCreation(const Project *project,
-                         const Utils::FilePath &source,
-                         const Utils::FilePaths &targets);
-
     static QList<ExtraCompilerFactory *> extraCompilerFactories();
 };
 
diff --git a/src/plugins/qtsupport/qscxmlcgenerator.cpp b/src/plugins/qtsupport/qscxmlcgenerator.cpp
index 3697bc05195..2c7194f254a 100644
--- a/src/plugins/qtsupport/qscxmlcgenerator.cpp
+++ b/src/plugins/qtsupport/qscxmlcgenerator.cpp
@@ -146,8 +146,6 @@ ExtraCompiler *QScxmlcGeneratorFactory::create(
         const Project *project, const Utils::FilePath &source,
         const Utils::FilePaths &targets)
 {
-    annouceCreation(project, source, targets);
-
     return new QScxmlcGenerator(project, source, targets, this);
 }
 
diff --git a/src/plugins/qtsupport/uicgenerator.cpp b/src/plugins/qtsupport/uicgenerator.cpp
index 4af7be07e1d..c0979ab13d5 100644
--- a/src/plugins/qtsupport/uicgenerator.cpp
+++ b/src/plugins/qtsupport/uicgenerator.cpp
@@ -107,8 +107,6 @@ ExtraCompiler *UicGeneratorFactory::create(const Project *project,
                                            const Utils::FilePath &source,
                                            const Utils::FilePaths &targets)
 {
-    annouceCreation(project, source, targets);
-
     return new UicGenerator(project, source, targets, this);
 }