Don't remove assets folder.

The user might copy files in assets folder at install time.

Change-Id: Ib26f6d0546aae70788c09bf455835647e3deb602
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>
Reviewed-by: BogDan Vatra <bogdan@kde.org>

src/androiddeployqt/main.cpp

@@ -865,8 +865,6 @@ void cleanTopFolders(const Options &options, const QDir &srcDir, const QString &
 
 void cleanAndroidFiles(const Options &options)
 {
-    deleteRecursively(options.outputDirectory + "assets");
-
     if (!options.androidSourceDirectory.isEmpty())
         cleanTopFolders(options, options.androidSourceDirectory, options.outputDirectory);