remove references to core-v-verif/vendor_lib/imperas

Created by: eroom1966

@MikeOpenHWGroup @silabs-hfegran @silabs-mateilga

I have a blocking issue due to the incorporation of libraries into the running simulator executable This is due to the previous generation ISS integration loading an out of date library in order to move forward I need any references removing, could somebody take the lead on this ?