At present Non-Embedded Codelists refer to Codelists that are present at all versions of the Standard. There is no way for a Non-Embedded Codelist to exist at some versions (decimal or integer) but not others.
In terms of hiding it from display on iatistandard.org against versions of the Standard from 1.05+, we have deemed it to be a
wontfix due to the way in which the site is generated, and upcoming work on the core website architecture.
In parallel to this, @petyakangalova (with assistance from others) has been working on a full solution to rectify the oversight that leads to the situation that has been brought up here (plus a range of other issues, some impacting the proposal to re-categorise some Embedded Codelists as Non-Embedded). I cannot recall the exact status of this, though last I saw it was a reasonably comprehensive and sensible proposal.
If the proposal in this thread is to completely wipe this Codelist from the face of history, that can be done (from a technical perspective). If the proposal is to remove it from versions 1.05+ (or 2.01+) only, that is not possible with the current methods of Codelist categorisation.