This question had certain comments by 2 users( JeffE , and scaaahu ) which although were not strictly on-topic, but nonetheless added to the discussion by providing a different viewpoint. Why were they removed ?
As the one responsible for deleting those comments, the comments were flagged as no longer relevant to the discussion. Having reviewed the changes made to the text of the question, and the texts of the comments, I believed the flags had merit, and deleted them.
I'll take a little less of a hard-line stance than EnergyNumbers; comments often add a lot to the discussion, but oftentimes users request that off-topic flags be deleted to make the answers cleaner. I suggest the following:
If you have something to say which directly related to the question and is not a request for clarification or more information, post it as an answer.
If you want to add something to an answer, you can either add that point as a comment, or if it's appropriate, edit it in!
If you want to clarify a point related to to an answer, add as a comment.
Comments are ephemeral and disposable across most Stack Exchange sites (math.se and MathOverflow.se are notable exceptions). If there's anything useful that comes out of a comment that applies to the post it's commenting on, then the post should be edited to reflect the comment accordingly.