Most of the uses of work.pauseStart are completely useless, it could
simply be a local variable. One use passes a parameter from gcMarkDone
to gcMarkTermination, but that could simply be an argument.
Keeping this field in workType makes it seems more important than it
really is, so just drop it.
Change-Id: I2fdc0b21f8844e5e7be47148c3e10f13e49815c6
Reviewed-on: https://go-review.googlesource.com/c/go/+/542075 Reviewed-by: Michael Knyszek <mknyszek@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>