package-cleanup --oldkernels --count=1 for uek4

hi all, i know about the usual way to reduce the number of kept kernels on rh/oe7, see e.g. https://www.certdepot.net/rhel7-set-number-old-kernels-kept for an introduction. however, package-cleanup out of yum-utils does (on testing) not seem to apply to uek's but only to standard kernels. unfortunately, both https://docs.oracle.com/cd/E52668_01/E53499/html/index.html and https://docs.oracle.com/cd/E52668_01/E54669/html/index.html do not cover this topic.

anyone around to tell how to ad hoc remove uek's in a way other than specifically listing uek's followed by one or more