remove unused returned variables name
remove unused returned variables name

The returned variables name seems be able to removed.

Signed-off-by: xiekeyang <43239a1d761bfde9c48de11b7981f737d518cda0@huawei.com>

shishir-a412ed/runc,opencontainers/runc,mikebrow/runc,wking/runc,estesp/runc,vbatts/runc,adrianreber/runc,cloudfoundry-incubator/runc,sunyuan3/runc,rhatdan/runc,mikebrow/runc,cloudfoundry-incubator/runc,kolyshkin/runc,xiaochenshen/runc,stefanberger/runc,rhatdan/runc,adrianreber/runc,mYmNeo/runc,hqhq/runc,mheon/runc,cyphar/runc,sunyuan3/runc,mYmNeo/runc,hqhq/runc,maxamillion/runc,estesp/runc,crosbymichael/runc,avagin/runc,maxamillion/runc,docker/runc,vbatts/runc,docker/runc,dqminh/runc,jhowardmsft/runc,kolyshkin/runc,coolljt0725/runc,nkwilson/runc,laijs/runc,mikebrow/runc,justincormack/runc,rajasec/runc,dqminh/runc,opencontainers/runc,hqhq/runc,avagin/runc,justincormack/runc,justincormack/runc,wking/runc,laijs/runc,wking/runc,laijs/runc,crosbymichael/runc,cyphar/runc,stefanberger/runc,mheon/runc,dqminh/runc,kolyshkin/runc,xiaochenshen/runc,nkwilson/runc,adrianreber/runc,docker/runc,rajasec/runc,WeiZhang555/runc,avagin/runc,jhowardmsft/runc,opencontainers/runc,kolyshkin/runc,mheon/runc,jhowardmsft/runc,rajasec/runc,WeiZhang555/runc,shishir-a412ed/runc,WeiZhang555/runc,opencontainers/runc,rhatdan/runc,vbatts/runc,nkwilson/runc,mYmNeo/runc,dqminh/runc,coolljt0725/runc,maxamillion/runc,shishir-a412ed/runc,cyphar/runc,cloudfoundry-incubator/runc,stefanberger/runc,keloyang/runc,xiaochenshen/runc,keloyang/runc,estesp/runc,crosbymichael/runc,rhatdan/runc,sunyuan3/runc,keloyang/runc,coolljt0725/runc