Allow removing hulls and resend their chunks

HullHider#removeHull stops hiding a hull: it shows the entities and REntities
the hull hid and resends its chunks to everybody who could not view it. A hull
is enabled again by adding and initialising it.

Hull#resendChunks only resends chunks the player has loaded. HullHider now
resends the chunks to non-viewers after initialising a hull itself, so
FightHullHider no longer does it.

FightSystem/FightSystem_Core/src/de/steamwar/fightsystem/utils/FightHullHider.java

@@ -32,7 +32,6 @@ import de.steamwar.fightsystem.states.StateDependentListener;
 import de.steamwar.fightsystem.states.StateDependentTask;
 import de.steamwar.hullhider.Hull;
 import de.steamwar.hullhider.HullHider;
-import org.bukkit.Bukkit;
 import org.bukkit.Material;
 import org.bukkit.block.Block;
 import org.bukkit.entity.Player;
@@ -68,14 +67,6 @@ public class FightHullHider {
     public void initialize(FightTeam team) {
         if (!TechHiderWrapper.ENABLED) return;
         hullHider.initialize(team);
-
-        // Chunks encoded while the hull was filled as hidden contain obfuscated blocks that are visible now, but no block update is generated for them
-        Hull hull = hullHider.getHull(team);
-        for (Player player : Bukkit.getOnlinePlayers()) {
-            if (!hull.isViewer(player)) {
-                FightSystem.getTechHider().reloadChunks(player, team.getExtendRegion(), Region.EMPTY);
-            }
-        }
     }
 
     public void fill(FightTeam team, boolean visible) {