Removed warp sign for players who leave a team or are kicked.

Fixes #67

src/main/java/world/bentobox/warps/listeners/WarpSignsListener.java

@@ -17,6 +17,8 @@
 import org.bukkit.event.block.SignChangeEvent;
 
 import world.bentobox.bentobox.BentoBox;
+import world.bentobox.bentobox.api.events.team.TeamEvent.TeamKickEvent;
+import world.bentobox.bentobox.api.events.team.TeamEvent.TeamLeaveEvent;
 import world.bentobox.bentobox.api.user.User;
 import world.bentobox.bentobox.util.Util;
 import world.bentobox.warps.Warp;
@@ -42,6 +44,20 @@ public WarpSignsListener(Warp addon) {
         this.plugin = addon.getPlugin();
     }
 
+    @EventHandler(priority = EventPriority.NORMAL, ignoreCancelled = true)
+    public void onPlayerLeave(TeamLeaveEvent e) {
+        // Remove any warp signs from this game mode
+        addon.getWarpSignsManager().removeWarp(e.getIsland().getWorld(), e.getPlayerUUID());
+        User.getInstance(e.getPlayerUUID()).sendMessage("warps.deactivate");
+    }
+
+    @EventHandler(priority = EventPriority.NORMAL, ignoreCancelled = true)
+    public void onPlayerLeave(TeamKickEvent e) {
+        // Remove any warp signs from this game mode
+        addon.getWarpSignsManager().removeWarp(e.getIsland().getWorld(), e.getPlayerUUID());
+        User.getInstance(e.getPlayerUUID()).sendMessage("warps.deactivate");
+    }
+
     /**
      * Checks to see if a sign has been broken
      * @param e - event