World checks in BrushSettings don't offer any performance benefit

worldedit-core/src/main/java/com/boydti/fawe/object/brush/BrushSettings.java

@@ -51,7 +51,6 @@ public class BrushSettings {
     private Expression size = DEFAULT_SIZE;
     private Set<String> permissions;
     private Scroll scrollAction;
-    private String lastWorld;
 
     public BrushSettings() {
         this.permissions = new HashSet<>();
@@ -213,20 +212,6 @@ public class BrushSettings {
         return this;
     }
 
-    /**
-     * Set the world the brush is being used in
-     * @param world
-     * @return true if the world differs from the last used world
-     */
-    public boolean setWorld(String world) {
-        boolean result = false;
-        if (this.lastWorld != null && !this.lastWorld.equalsIgnoreCase(world)) {
-            result = true;
-        }
-        this.lastWorld = world;
-        return result;
-    }
-
     public Brush getBrush() {
         return brush;
     }

worldedit-core/src/main/java/com/sk89q/worldedit/command/tool/BrushTool.java

@@ -491,7 +491,7 @@ public class BrushTool implements DoubleActionTraceTool, ScrollTool, MovableTool
         Brush brush = current.getBrush();
         if (brush == null) return false;
 
-        if (current.setWorld(player.getWorld().getName()) && !current.canUse(player)) {
+        if (!current.canUse(player)) {
             player.print(Caption.of("fawe.error.no-perm" , StringMan.join(current.getPermissions(), ",")));
             return false;
         }