.cirrus.yml: rm FIXME from rootless fs on CentOS 7 #6091

Job	Run time
cross-i386	1m 17s
test (ubuntu-20.04, 1.20.x, rootless, -race)	6m 50s
test (ubuntu-20.04, 1.20.x, rootless)	6m 19s
cross-i386 (runc_nodmz)	1m 19s
test (ubuntu-20.04, 1.20.x, -race)	7m 22s
test (ubuntu-20.04, 1.20.x)	6m 37s
test (ubuntu-20.04, 1.21.x, rootless, -race)	6m 45s
test (ubuntu-20.04, 1.21.x, rootless)	6m 11s
test (ubuntu-20.04, 1.21.x, -race)	7m 30s
test (ubuntu-20.04, 1.21.x)	6m 22s
test (ubuntu-20.04, 1.21.x, criu-dev)	7m 10s
test (ubuntu-22.04, 1.20.x, rootless, -race)	10m 37s
test (ubuntu-22.04, 1.20.x, rootless)	10m 25s
test (ubuntu-22.04, 1.20.x, -race)	8m 31s
test (ubuntu-22.04, 1.20.x)	8m 1s
test (ubuntu-22.04, 1.21.x, rootless, -race)	10m 26s
test (ubuntu-22.04, 1.21.x, rootless)	10m 15s
test (ubuntu-22.04, 1.21.x, -race)	8m 45s
test (ubuntu-22.04, 1.21.x)	8m 20s
test (ubuntu-22.04, 1.21.x, runc_nodmz)	8m 3s
test (ubuntu-22.04, 1.21.x, criu-dev)	8m 17s
test (actuated-arm64-6cpu-8gb, 1.21.x, rootless)	11m 27s
test (actuated-arm64-6cpu-8gb, 1.21.x)	7m 24s
	2h 54m 13s

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