[pre-commit.ci] auto fixes from pre-commit.com hooks

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Author: pre-commit-ci[bot]

machine_learning/neural_networks/cnn_mnist.py

@@ -70,4 +70,3 @@
 # Evaluate the model on test data
 test_loss, test_acc = model.evaluate(x_test, y_test, verbose=2)
 print(f"\nTest accuracy: {test_acc}")
-