[tex-live] tlmgr reports success when not removing packages

[Adam R. Maxwell]

I recently had a TLU user report that package removal was claimed 
to succeed when it did not in fact remove anything.  Should tlmgr
exit with non-zero status when it refuses to remove a package?

Example:

$ sudo tlmgr remove alg
tlmgr: not removing alg, needed by collection-science
tlmgr: no packages removed.
$ echo $?
0

I could keep track of the packages requested for removal in TLU,
then see which (if any) were removed by comparing with a subsequent
listing.  However, it seems odd for tlmgr to report success when
it refuses to do what is asked :).

(and yes, I understand why it doesn't, and that I can force it)

thanks,
Adam