git: openjdk/loom: fibers: remove test vthread/DoContinueSingleStepTest

[duke]

Changeset: f767b46c
Author:    Serguei Spitsyn <serguei.spitsyn at oracle.com>
Date:      2021-08-26 03:34:27 +0000
URL:       https://git.openjdk.java.net/loom/commit/f767b46c393d7cf23cfc592e6ba8b3012f1d0654

remove test vthread/DoContinueSingleStepTest

! test/hotspot/jtreg/ProblemList-vthread.txt
! test/hotspot/jtreg/ProblemList.txt
- test/hotspot/jtreg/serviceability/jvmti/vthread/DoContinueSingleStepTest/DoContinueSingleStepTest.java
- test/hotspot/jtreg/serviceability/jvmti/vthread/DoContinueSingleStepTest/libDoContinueSingleStepTest.cpp