I have the free version of Renderman installed, I never use it and I want to remove it but there seems to be no uninstall feature. How do I remove this plugin? Thanks!

there is some info here:
https://renderman.pixar.com/resources/RenderMan_20/install.html [renderman.pixar.com]

Unfortunately the answer is not there. I have uninstalled it yet I can still access some of the Renderman nodes in the Out tab. Any idea how to find these? The filepaths created by the software are all gone and have been properly uninstalled, yet some traces remain.

ah - there are three (3) output nodes that ship with Houdini and are not part of the Renderman Install:
RenderMan
RenderMan archive
RenderMan RIS

just ignore them