remove obsolete code

.pre-commit-config.yaml

...ets/dataset_formatters/extraction_utils/arkindex_utils.py

Datasets/dataset_formatters/generic_dataset_formatter.py

Datasets/dataset_formatters/simara_formatter.py

OCR/document_OCR/dan/main_dan.py

OCR/document_OCR/dan/trainer_dan.py

OCR/line_OCR/ctc/main_line_ctc.py

OCR/line_OCR/ctc/main_syn_line.py

OCR/line_OCR/ctc/models_line_ctc.py

OCR/line_OCR/ctc/trainer_line_ctc.py

OCR/ocr_dataset_manager.py

OCR/ocr_manager.py

README.md

basic/generic_dataset_manager.py

basic/generic_training_manager.py

basic/metric_manager.py

basic/scheduler.py

basic/transforms.py

basic/utils.py

prediction-requirements.txt