Remove unused image 'living_room_2.jpeg' from IMAGE_PATHS and update corresponding labels in app.py for clarity.

app.py

@@ -41,7 +41,6 @@ HEIGHT = 576
 IMAGE_PATHS = ['test_samples/oxford.jpg', 
                'test_samples/open_door.jpg', 
                'test_samples/living_room.jpg', 
-               'test_samples/living_room_2.jpeg',
                'test_samples/arc_de_tromphe.jpeg',
                'test_samples/changi.jpg', 
                'test_samples/jesus.jpg',]
@@ -387,7 +386,6 @@ def render_demonstrate(
                     'test_samples/oxford.jpg': 'Oxford University',
                     'test_samples/open_door.jpg': 'Bedroom Interior',
                     'test_samples/living_room.jpg': 'Living Room',
-                    'test_samples/living_room_2.jpeg': 'Living Room 2',
                     'test_samples/arc_de_tromphe.jpeg': 'Arc de Triomphe',
                     'test_samples/jesus.jpg': 'Jesus College',
                     'test_samples/changi.jpg': 'Changi Airport',