Here’s what I think (I know you don’t care, tough cookies): some of his cabinet members were discussing the Constitutional requirements that have to be met in order to understand what their roles might be if, for some bizarre reason, Trump actually became incapacitated - the sort of prudent thing that smart cabinet officers should be doing - and now for some stupid reason this idiot is twisting that into a crockpot conspiracy.
In other words, the subject was discussed, but not in the sense of an actual desire or intent to remove Trump.