In Jaikoz, they are two different fields Track No and Track Total (unless you are looking at mp3s in the ID3 Edit tab) so I assume you mean within other programs.
So add the Track Total as a viewable column and then click on the Column Header and select Empty Column to remove Track Total. You will probably also want to prevent Track Total being autopopulated by Musicbrainz or Discogs by changing Preferences/Musicbrainz/Format 2/Track Total and Preferences/Remote Correct/Discogs?track Total