Update app.py

app.py

@@ -28,7 +28,7 @@ from tensorflow.keras.callbacks import Callback, EarlyStopping, ModelCheckpoint
 from tensorflow.keras.optimizers import Adam
 from tensorflow.keras.applications import MobileNetV2
 from tensorflow.keras import Model
-from tensorflow.keras.layers.experimental import preprocessing
+
 from keras.layers import Dense, Flatten, Dropout, BatchNormalization
 
 # System libraries