Fix compiler warnings

"braces around scalar initializer" and
"lambda capture 'this' is not used"

Amends b60fd77fc1
Amends 181b362fcf

Change-Id: Ie7c21db13644e98c0eec06a22f977ed4b923fae3
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>

src/plugins/coreplugin/editormanager/editormanager.cpp

@@ -429,7 +429,7 @@ void EditorManagerPrivate::init()
     ActionBuilder save(this, Constants::SAVE);
     save.setContext(editManagerContext);
     save.bindContextAction(&m_saveAction);
-    save.setOnTriggered(this, [this] { EditorManager::saveDocument(); });
+    save.setOnTriggered(this, [] { EditorManager::saveDocument(); });
 
     // Save As Action
     ActionBuilder saveAs(this, Constants::SAVEAS);

src/plugins/designer/formeditorplugin.cpp

@@ -100,7 +100,7 @@ bool FormEditorPlugin::initialize([[maybe_unused]] const QStringList &arguments,
         wizard->setDescription(Tr::tr("Creates a Qt Designer form along with a matching class (C++ header and source file) "
         "for implementation purposes. You can add the form and class to an existing Qt Widget Project."));
 
-        return {wizard};
+        return wizard;
     });
 #endif