"TestRestartContainerwithRestartPolicy" contains some codes that could be flaky, it's supposed to be fixed in #22256. This commit removes unnecessary code, make the test case cleaner. Signed-off-by: Zhang Wei <zhangwei555@huawei.com> Upstream-commit: a7eecd2b61296825f9a0f739dbc06ad65a3d2c5d Component: engine