deprecate PlotId#copy

Core/src/main/java/com/plotsquared/core/command/DatabaseCommand.java

@@ -176,7 +176,7 @@ public class DatabaseCommand extends SubCommand {
                                                         );
                                                 worldFile.renameTo(newFile);
                                             }
-                                            plot.setId(newId.copy());
+                                            plot.setId(newId);
                                             plot.setArea(pa);
                                             plots.add(plot);
                                             continue;

Core/src/main/java/com/plotsquared/core/plot/Plot.java

@@ -1836,8 +1836,8 @@ public class Plot {
         }
         // Swap cached
         final PlotId temp = PlotId.of(this.getId().getX(), this.getId().getY());
-        this.id = plot.getId().copy();
+        this.id = plot.getId();
-        plot.id = temp.copy();
+        plot.id = temp;
         this.area.removePlot(this.getId());
         plot.area.removePlot(plot.getId());
         this.area.addPlotAbs(this);
@@ -1863,7 +1863,7 @@ public class Plot {
             return false;
         }
         this.area.removePlot(this.id);
-        this.id = plot.getId().copy();
+        this.id = plot.getId();
         this.area.addPlotAbs(this);
         DBFunc.movePlot(this, plot);
         TaskManager.runTaskLater(whenDone, TaskTime.ticks(1L));

Core/src/main/java/com/plotsquared/core/plot/PlotId.java

@@ -110,9 +110,11 @@ public final class PlotId {
      * Get a copy of the plot ID
      *
      * @return Plot ID copy
+     * @deprecated PlotId is immutable, copy is not required.
      */
+    @Deprecated(forRemoval = true, since = "TODO")
     public @NonNull PlotId copy() {
-        return of(this.getX(), this.getY());
+        return this;
     }
 
     /**