Removing ScanBITS references

[phutelmyer]

Describe the change
Per issue #305, the BITS scanner is to be removed due to dependency issues.

This change removes all references to the BITS Scanner.

Describe testing procedures
docker-compose -f build/docker-compose.yaml build --build-arg CONFIG_TESTS=true backend

#21 3.769 ============================= test session starts ==============================
...
#21 3.769 tests/test_distribute.py .
#21 3.893 tests/test_required_for_scanner.py .
#21 3.897 tests/test_scan_base64.py .
#21 3.900 tests/test_scan_base64_pe.py .
#21 3.903 tests/test_scan_batch.py .
#21 3.950 tests/test_scan_bmp_eof.py .
#21 3.953 tests/test_scan_bzip2.py .
#21 3.957 tests/test_scan_capa.py ...
#21 20.03 tests/test_scan_ccn.py .
#21 20.04 tests/test_scan_delay.py .
#21 21.05 tests/test_scan_dmg.py ...
#21 21.12 tests/test_scan_docx.py .
#21 21.42 tests/test_scan_elf.py .
#21 21.49 tests/test_scan_email.py .
#21 21.57 tests/test_scan_encrypted_doc.py ....
#21 25.15 tests/test_scan_encrypted_zip.py ..
#21 25.60 tests/test_scan_entropy.py .
#21 25.60 tests/test_scan_exception.py .
#21 25.61 tests/test_scan_exiftool.py ..
#21 25.96 tests/test_scan_footer.py ..
#21 25.97 tests/test_scan_gif.py .
#21 25.97 tests/test_scan_gzip.py .
#21 25.97 tests/test_scan_hash.py .
#21 25.98 tests/test_scan_header.py ..
#21 25.98 tests/test_scan_html.py ..
#21 25.99 tests/test_scan_ini.py .
#21 26.00 tests/test_scan_iso.py .
#21 26.00 tests/test_scan_javascript.py ..
#21 26.04 tests/test_scan_jpeg.py ..
#21 26.08 tests/test_scan_json.py .
#21 26.08 tests/test_scan_libarchive.py ......
#21 26.11 tests/test_scan_lnk.py .
#21 26.11 tests/test_scan_lzma.py .
#21 26.11 tests/test_scan_macho.py .
#21 26.13 tests/test_scan_manifest.py .
#21 26.13 tests/test_scan_msi.py .
#21 26.31 tests/test_scan_nf.py ....
#21 26.41 tests/test_scan_ocr.py ...
#21 92.02 tests/test_scan_ole.py ....
#21 92.04 tests/test_scan_pcap.py ..
#21 92.99 tests/test_scan_pdf.py .
#21 93.05 tests/test_scan_pe.py .
#21 93.05 tests/test_scan_pgp.py ....
#21 93.07 tests/test_scan_plist.py .
#21 93.07 tests/test_scan_png_eof.py ...
#21 93.08 tests/test_scan_qr.py ...
#21 93.26 tests/test_scan_rar.py .
#21 93.28 tests/test_scan_seven_zip.py .....
#21 108.7 tests/test_scan_strings.py .
#21 108.7 tests/test_scan_tar.py .
#21 108.7 tests/test_scan_tlsh.py .
#21 108.7 tests/test_scan_upx.py .
#21 108.8 tests/test_scan_url.py ..
#21 108.8 tests/test_scan_vhd.py ..
#21 108.8 tests/test_scan_x509.py ..
#21 108.8 tests/test_scan_xl4ma.py .
#21 108.9 tests/test_scan_xml.py .
#21 108.9 tests/test_scan_yara.py .
#21 108.9 tests/test_scan_zip.py ..
....
#21 119.0 ======================= 166 passed, 4 warnings in 9.09s ========================

Sample output
N/A

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of and tested my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings

[ryanohoro]

LGTM