[BioC] How uninstall the BioC update in my home directory?

[Peng Yu]

Hi,

source("http://bioconductor.org/biocLite.R")
update.packages(repos=biocinstallRepos(), ask=FALSE)

I used the above commands to update the packages, which created the
directory 'R' in my home directory. Later, my system administrator
installed the updates system wide (the system is linux). I'm wondering
what the correct procedure is to uninstall my own updates.

Regards,
Peng