Remove pickle import base_custom_evaluator.py

Author: pwolnows

tools/accuracy_checker/accuracy_checker/evaluators/custom_evaluators/base_custom_evaluator.py

@@ -14,7 +14,6 @@
 limitations under the License.
 """
 
-import pickle  # nosec B403  # disable import-pickle check
 from ..base_evaluator import BaseEvaluator
 from ...progress_reporters import ProgressReporter
 from ..quantization_model_evaluator import create_dataset_attributes