Found a unused class, safe to remove.

Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>

src/MG.h

@@ -62,34 +62,6 @@ public:
     }
 };
 
-
-class SLEEP : public QThread
-{
-public:
-    /**
-     * @brief Set a thread to sleep for seconds
-     * @param s time in seconds to sleep
-     **/
-    static void sleep(unsigned long s) {
-        QThread::sleep(s);
-    }
-    /**
-     * @brief Set a thread to sleep for milliseconds
-     * @param ms time in milliseconds to sleep
-     **/
-    static void msleep(unsigned long ms) {
-        QThread::msleep(ms);
-    }
-    /**
-     * @brief Set a thread to sleep for microseconds
-     * @param us time in microseconds to sleep
-     **/
-    static void usleep(unsigned long us) {
-        QThread::usleep(us);
-    }
-};
-
-
 class UNITS
 {
 public: