Mime type settings: Restore user changes

Change-Id: I6c83989113de3beb5d27eb7c39b5c9e825b541e8
Reviewed-by: David Schulz <david.schulz@theqtcompany.com>

src/plugins/coreplugin/coreplugin.cpp

@@ -211,8 +211,6 @@ bool CorePlugin::initialize(const QStringList &arguments, QString *errorMessage)
 
 void CorePlugin::extensionsInitialized()
 {
-    // TODO
-//    MimeDatabase::syncUserModifiedMimeTypes();
     if (m_designMode->designModeIsRequired())
         addObject(m_designMode);
     m_findPlugin->extensionsInitialized();