Valgrind: Modernize

modernize-*

Change-Id: I6db60dce78cf2575e36caa597b1f095adba34fd9
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/plugins/valgrind/valgrindplugin.h

@@ -40,7 +40,7 @@ class ValgrindPlugin : public ExtensionSystem::IPlugin
     Q_PLUGIN_METADATA(IID "org.qt-project.Qt.QtCreatorPlugin" FILE "Valgrind.json")
 
 public:
-    ValgrindPlugin() {}
+    ValgrindPlugin() = default;
     ~ValgrindPlugin() override;
 
     bool initialize(const QStringList &arguments, QString *errorString) override;