Remove erroneous break statement in scheduler. Fixes BUKKIT-3395

By: Wesley Wolfe <weswolf@aol.com>

paper-server/src/main/java/org/bukkit/craftbukkit/scheduler/CraftScheduler.java

@@ -211,7 +211,6 @@ public class CraftScheduler implements BukkitScheduler {
                                 if (task.isSync()) {
                                     runners.remove(task.getTaskId());
                                 }
-                                break;
                             }
                         }
                     }