Flymake warning "Canceling obsolete check"

["R. Diez" <rdiezmail-emacs@yahoo.de>]

Hi all:

I recently started using Flymake to ShellCheck my scripts, and now I get a buffer called *Flymake log* at random intervals with repeated warnings like this:

⛔ Warning [sh-script.el MyScript.sh]: Canceling obsolete check shellcheck
⛔ Warning [sh-script.el MyScript.sh]: Canceling obsolete check shellcheck
⛔ Warning [sh-script.el MyScript.sh]: Canceling obsolete check shellcheck<1>
⛔ Warning [sh-script.el MyScript.sh]: Canceling obsolete check shellcheck
⛔ Warning [sh-script.el MyScript.sh]: Canceling obsolete check shellcheck
⛔ Warning [sh-script.el MyScript.sh]: Canceling obsolete check shellcheck<1>
⛔ Warning [sh-script.el MyScript.sh]: Canceling obsolete check shellcheck
⛔ Warning [sh-script.el MyScript.sh]: Canceling obsolete check shellcheck

There is no indication about why this warning is been generated, or what I could do to fix it. I searched around but found no helpful information in this area.

If the warning is harmless, how do I suppress it?

By the way, the icon is Unicode Character 'NO ENTRY SIGN' (U+1F6AB). I personally think that warnings should probably have a different icon like Unicode Character 'WARNING SIGN' (U+26A0).

Thanks in advance,
   rdiez