Repeated Oh My Zsh brew plugin warnings I keep seeing this warning every time I open an new shell on one of my machines:

 Oh My Zsh brew plugin:

  With the advent of their 1.0 release, Homebrew has decided to bundle
  the zsh completion as part of the brew installation, so we no longer
  ship it with the brew plugin; now it only has brew aliases.

  If you find that brew completion no longer works, make sure you have
  your Homebrew installation fully up to date.

  You will only see this message once.


Message keeps coming back even though it threatens that "you will only see this message once."

Thoughts on how to 'fix' this?  It appears to be triggered by mkdir being aliased?!?
zsh -x (or maybe zsh -x -l if the code comes from a rc file read only during a login session) enables tracing; this verbose output can then be used to find where exactly the message comes from.

% zsh -x 2&gt;searchthroughthis.txt
% exit
% less -p advent searchthroughthis.txt
...