Revert "Wake the getwork scheduler after every restart threads."

This reverts commit 5b03e7497db5cc0cab7d2b788168c2d3f2b0fc87.

Redundant.

cgminer.c

@@ -3381,8 +3381,6 @@ static void restart_threads(bool all)
 	mutex_lock(&restart_lock);
 	pthread_cond_broadcast(&restart_cond);
 	mutex_unlock(&restart_lock);
-
-	wake_gws();
 }
 
 static void set_curblock(char *hexstr, unsigned char *hash)