Remove Is{RVH}OnSwappedOutList, now that swappedout:// is gone.

BUG=357747
TEST=No behavior change.
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_site_isolation

Review-Url: https://codereview.chromium.org/1981413002
Cr-Commit-Position: refs/heads/master@{#394907}
5 files changed