follow codeQL and remove unused variable

Author: allenhzy

art/defences/detector/evasion/beyond_detector.py

@@ -17,6 +17,7 @@
 # SOFTWARE.
 """
 This module implements the BEYOND detector for adversarial examples detection.
+
 | Paper link: https://openreview.net/pdf?id=S4LqI6CcJ3
 """
 import numpy as np
@@ -25,8 +26,6 @@
     from art.utils import CLASSIFIER_NEURALNETWORK_TYPE
 
 
-logger = logging.getLogger(__name__)
-
 from art.defences.detector.evasion.evasion_detector import EvasionDetector
 
 class BeyondDetector(EvasionDetector):

tests/defences/detector/evasion/test_beyond_detector.py

@@ -29,8 +29,6 @@
 
 from tests.utils import ARTTestException
 
-logger = logging.getLogger(__name__)
-
 from torchvision import models, transforms
 
 class SimSiamWithCls(nn.Module):