migrate to Qt6

common/cmautils.h

@@ -26,24 +26,7 @@
 
 #include <vitamtp.h>
 
-// Qt4 doesn't have public methods for Thread::*sleep
-#if QT_VERSION >= QT_VERSION_CHECK(5, 0, 0)
 typedef QThread Sleeper;
-#else
-class Sleeper : QThread
-{
-public:
-    static void sleep(unsigned long secs) {
-        QThread::sleep(secs);
-    }
-    static void msleep(unsigned long msecs) {
-        QThread::msleep(msecs);
-    }
-    static void usleep(unsigned long usecs) {
-        QThread::usleep(usecs);
-    }
-};
-#endif
 
 bool removeRecursively(const QString &path);
 QString readable_size(qint64 size, bool use_gib = false);