Remove unnecessary lock in order enumeration

The lock in the enumeration of orders in the Overcooked simulator's 2D visualization was extra and thus, it was removed. This simplifies the code and potentially improves performance, as locks can introduce overhead and contention issues. It was confirmed that eliminating this lock doesn't affect the functionality or performance of the order enumeration.

overcooked_simulator/gui_2d_vis/overcooked_gui.py

@@ -581,44 +581,43 @@ class PyGameGUI:
         pygame.draw.rect(order_screen, bg_color, order_screen.get_rect())
 
         order_rects_start = (orders_height // 2) - (self.grid_size // 2)
-        with self.simulator.env.lock:
-            for idx, order in enumerate(state["orders"]):
-                order: Order
-                order_upper_left = [
-                    order_rects_start + idx * self.grid_size * 1.2,
-                    order_rects_start,
-                ]
-                pygame.draw.rect(
-                    order_screen,
-                    colors["red"],
-                    pygame.Rect(
-                        order_upper_left[0],
-                        order_upper_left[1],
-                        self.grid_size,
-                        self.grid_size,
-                    ),
-                    width=2,
-                )
-                center = np.array(order_upper_left) + np.array(
-                    [self.grid_size / 2, self.grid_size / 2]
-                )
-                self.draw_thing(
-                    center,
-                    self.visualization_config["Plate"]["parts"],
-                    screen=order_screen,
-                )
-                self.draw_item(
-                    center,
-                    order.meal,
-                    plate=True,
-                    screen=order_screen,
-                )
-                order_done_seconds = (
-                    (order.start_time + order.max_duration) - state["env_time"]
-                ).total_seconds()
+        for idx, order in enumerate(state["orders"]):
+            order: Order
+            order_upper_left = [
+                order_rects_start + idx * self.grid_size * 1.2,
+                order_rects_start,
+            ]
+            pygame.draw.rect(
+                order_screen,
+                colors["red"],
+                pygame.Rect(
+                    order_upper_left[0],
+                    order_upper_left[1],
+                    self.grid_size,
+                    self.grid_size,
+                ),
+                width=2,
+            )
+            center = np.array(order_upper_left) + np.array(
+                [self.grid_size / 2, self.grid_size / 2]
+            )
+            self.draw_thing(
+                center,
+                self.visualization_config["Plate"]["parts"],
+                screen=order_screen,
+            )
+            self.draw_item(
+                center,
+                order.meal,
+                plate=True,
+                screen=order_screen,
+            )
+            order_done_seconds = (
+                (order.start_time + order.max_duration) - state["env_time"]
+            ).total_seconds()
 
-                percentage = order_done_seconds / order.max_duration.total_seconds()
-                self.draw_progress_bar(center, percentage, screen=order_screen)
+            percentage = order_done_seconds / order.max_duration.total_seconds()
+            self.draw_progress_bar(center, percentage, screen=order_screen)
 
         orders_rect = order_screen.get_rect()
         orders_rect.center = [