rMOZILLARELEASE91a27a089644

Bug 1615331 [wpt PR 21782] - Remove remaining promise_rejects uses, a=testonly

Automatic update from web-platform-tests
Remove remaining promise_rejects uses

--

wpt-commits: 39b27a7875c58fa3cf6bc13279eea73eacfe378f
wpt-pr: 21782