diff --git a/src/plugins/clangtools/documentclangtoolrunner.cpp b/src/plugins/clangtools/documentclangtoolrunner.cpp
index bc2a036fbc0..cdf19f7a6ce 100644
--- a/src/plugins/clangtools/documentclangtoolrunner.cpp
+++ b/src/plugins/clangtools/documentclangtoolrunner.cpp
@@ -348,20 +348,6 @@ bool DocumentClangToolRunner::isSuppressed(const Diagnostic &diagnostic) const
     return Utils::anyOf(m_suppressed, equalsSuppressed);
 }
 
-const ClangDiagnosticConfig DocumentClangToolRunner::getDiagnosticConfig(Project *project)
-{
-    const auto projectSettings = ClangToolsProjectSettings::getSettings(project);
-    m_projectSettingsUpdate = connect(projectSettings.data(),
-                                      &ClangToolsProjectSettings::changed,
-                                      this,
-                                      &DocumentClangToolRunner::run);
-
-    const Id id = projectSettings->useGlobalSettings()
-            ? ClangToolsSettings::instance()->runSettings().diagnosticConfigId()
-            : projectSettings->runSettings().diagnosticConfigId();
-    return diagnosticConfig(id);
-}
-
 ClangToolRunner *DocumentClangToolRunner::createRunner(ClangToolType tool,
                                                        const ClangDiagnosticConfig &config,
                                                        const Environment &env)
diff --git a/src/plugins/clangtools/documentclangtoolrunner.h b/src/plugins/clangtools/documentclangtoolrunner.h
index c74d103d61e..2d59e9ecd70 100644
--- a/src/plugins/clangtools/documentclangtoolrunner.h
+++ b/src/plugins/clangtools/documentclangtoolrunner.h
@@ -48,7 +48,6 @@ private:
 
     bool isSuppressed(const Diagnostic &diagnostic) const;
 
-    const CppEditor::ClangDiagnosticConfig getDiagnosticConfig(ProjectExplorer::Project *project);
     ClangToolRunner *createRunner(CppEditor::ClangToolType tool,
                                   const CppEditor::ClangDiagnosticConfig &config,
                                   const Utils::Environment &env);