[ci] fix R CMD check issue 'unable to verify current time' #3341
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This PR skips this
R CMD check
check that is breaking buildsYou can see https://stat.ethz.ch/pipermail/r-package-devel/2020q3/005930.html for details. Essentially
R CMD check
relies on two small web services that provide a global clock, and this NOTE can show up when those services are unavailable. They are experiencing some issues this week 🙃I think this hack is better than just bumping
ALLOWED_CHECK_NOTES
, as described here: #3338 (comment)I've added this fix in #3336 and #3298 , but since it's blocking any other PRs, I thought it made sense to pull it out into its own PR we can merge quickly.