Remove superfluous javadocs

src/main/java/org/bukkit/event/world/ChunkUnloadEvent.java

@@ -13,22 +13,10 @@ public class ChunkUnloadEvent extends ChunkEvent implements Cancellable {
         super(Type.CHUNK_UNLOAD, chunk);
     }
 
-    /**
-     * Gets the cancellation state of this event. A cancelled event will not
-     * be executed in the server, but will still pass to other plugins
-     *
-     * @return true if this event is cancelled
-     */
     public boolean isCancelled() {
         return cancel;
     }
 
-    /**
-     * Sets the cancellation state of this event. A cancelled event will not
-     * be executed in the server, but will still pass to other plugins
-     *
-     * @param cancel true if you wish to cancel this event
-     */
     public void setCancelled(boolean cancel) {
         this.cancel = cancel;
     }

src/main/java/org/bukkit/event/world/PortalCreateEvent.java

@@ -27,22 +27,10 @@ public class PortalCreateEvent extends WorldEvent implements Cancellable {
         return this.blocks;
     }
 
-    /**
-     * Gets the cancellation state of this event. A canceled event will not
-     * be executed in the server, but will still pass to other plugins
-     *
-     * @return true if this event is canceled
-     */
     public boolean isCancelled() {
         return cancel;
     }
 
-    /**
-     * Sets the cancellation state of this event. A canceled event will not
-     * be executed in the server, but will still pass to other plugins
-     *
-     * @param cancel true if you wish to cancel this event
-     */
     public void setCancelled(boolean cancel) {
         this.cancel = cancel;
     }

src/main/java/org/bukkit/event/world/WorldUnloadEvent.java

@@ -7,29 +7,16 @@ import org.bukkit.event.Cancellable;
  * Called when a World is unloaded
  */
 public class WorldUnloadEvent extends WorldEvent implements Cancellable {
-
     private boolean isCancelled;
 
     public WorldUnloadEvent(World world) {
         super(Type.WORLD_UNLOAD, world);
     }
 
-    /**
-     * Gets the cancellation state of this event. A cancelled event will not
-     * be executed in the server, but will still pass to other plugins
-     *
-     * @return true if this event is cancelled
-     */
     public boolean isCancelled() {
         return this.isCancelled;
     }
 
-    /**
-     * Sets the cancellation state of this event. A cancelled event will not
-     * be executed in the server, but will still pass to other plugins
-     *
-     * @param cancel true if you wish to cancel this event
-     */
     public void setCancelled(boolean cancel) {
         this.isCancelled = cancel;
     }