Revert "remove shadow of public method getPlayers"

This reverts commit 6c159d6aa2.

common/src/main/java/net/lionarius/skinrestorer/mixin/PlayerListMixin.java

@@ -20,6 +20,9 @@ import java.util.List;
 @Mixin(PlayerList.class)
 public abstract class PlayerListMixin {
     
+    @Shadow
+    public abstract List<ServerPlayer> getPlayers();
+    
     @Shadow @Final
     private MinecraftServer server;
     
@@ -30,7 +33,7 @@ public abstract class PlayerListMixin {
     
     @Inject(method = "removeAll", at = @At("HEAD"))
     private void removeAll(CallbackInfo ci) {
-        for (var player : ((PlayerList) (Object) this).getPlayers()) {
+        for (var player : getPlayers()) {
             SkinRestorer.Events.onPlayerDisconnect(player);
         }
     }