Leapp upgrade failed with error 'Inhibitor: Use of CIFS detected. Upgrade can't proceed'

Issue

• After executed leapp preupgrade command, Inhibitor: Use of CIFS detected. Upgrade can't proceed error occurs

  # leapp preupgrade --target 8.6
    Upgrade has been inhibited due to the following problems:
    1. Inhibitor: Use of CIFS detected. Upgrade can't proceed
  

• Found the following inhibitor in the /var/log/leapp/leapp-report.txt file

  # cat /var/log/leapp/leapp-report.txt
    Risk Factor: high (inhibitor)
    Title: Use of CIFS detected. Upgrade can't proceed
    Summary: CIFS is currently not supported by the inplace upgrade.
    Remediation: [hint] Comment out CIFS entries to proceed with the upgrade.
  

• Cannot locate where to comment out the cifs entries

• Tried to remove cifs-utils and samba packages but error still exists