smp: fix work item deletion
smp: fix work item deletion

Delete it after completion, not after responding.

wildinto/scylla,scylladb/scylla-seastar,scylladb/scylla,kjniemi/scylla,wildinto/seastar,cloudius-systems/seastar,jonathanleang/seastar,aruanruan/scylla,scylladb/scylla,bowlofstew/seastar,avikivity/scylla,ducthangho/imdb,koolhazz/seastar,respu/scylla,bowlofstew/scylla,joerg84/seastar,joerg84/seastar,norcimo5/seastar,scylladb/scylla,raphaelsc/scylla,leejir/seastar,anzihenry/seastar,rentongzhang/scylla,rluta/scylla,dreamsxin/seastar,senseb/scylla,xtao/seastar,bowlofstew/seastar,capturePointer/scylla,anzihenry/seastar,norcimo5/seastar,leejir/seastar,linearregression/seastar,shyamalschandra/seastar,tempbottle/seastar,anzihenry/seastar,ducthangho/imdb,dwdm/scylla,dreamsxin/seastar,slivne/seastar,bzero/seastar,syuu1228/seastar,sjperkins/seastar,gwicke/scylla,capturePointer/scylla,acbellini/scylla,kangkot/scylla,rluta/scylla,linearregression/seastar,aruanruan/scylla,hongliangzhao/seastar,cloudius-systems/seastar,acbellini/scylla,senseb/scylla,capturePointer/scylla,guiquanz/scylla,victorbriz/scylla,dwdm/scylla,chunshengster/seastar,slivne/seastar,linearregression/scylla,asias/scylla,kjniemi/seastar,scylladb/scylla-seastar,acbellini/seastar,duarten/scylla,mixja/seastar,chunshengster/seastar,bzero/seastar,flashbuckets/seastar,linearregression/scylla,bowlofstew/scylla,acbellini/seastar,mixja/seastar,dwdm/seastar,acbellini/seastar,wildinto/scylla,avikivity/scylla,glommer/scylla,scylladb/scylla-seastar,raphaelsc/seastar,joerg84/seastar,glommer/scylla,tempbottle/scylla,eklitzke/scylla,victorbriz/scylla,raphaelsc/seastar,senseb/scylla,stamhe/scylla,raphaelsc/seastar,scylladb/seastar,chunshengster/seastar,flashbuckets/seastar,xtao/seastar,duarten/scylla,linearregression/seastar,printedheart/seastar,justintung/scylla,respu/scylla,scylladb/seastar,hongliangzhao/seastar,stamhe/seastar,sjperkins/seastar,sjperkins/seastar,wildinto/seastar,eklitzke/scylla,dwdm/seastar,eklitzke/scylla,xtao/seastar,hongliangzhao/seastar,justintung/scylla,duarten/scylla,tempbottle/seastar,jonathanleang/seastar,shyamalschandra/seastar,ducthangho/imdb,jonathanleang/seastar,bzero/seastar,tempbottle/seastar,syuu1228/seastar,shaunstanislaus/scylla,raphaelsc/scylla,kjniemi/seastar,victorbriz/scylla,stamhe/scylla,phonkee/scylla,avikivity/seastar,justintung/scylla,avikivity/seastar,koolhazz/seastar,kjniemi/seastar,tempbottle/scylla,gwicke/scylla,shaunstanislaus/scylla,scylladb/scylla,phonkee/scylla,kangkot/scylla,rentongzhang/scylla,kangkot/scylla,asias/scylla,raphaelsc/scylla,leejir/seastar,guiquanz/scylla,rentongzhang/scylla,linearregression/scylla,slivne/seastar,shaunstanislaus/scylla,wildinto/seastar,dreamsxin/seastar,stamhe/seastar,aruanruan/scylla,gwicke/scylla,stamhe/scylla,phonkee/scylla,dwdm/seastar,bowlofstew/seastar,cloudius-systems/seastar,asias/scylla,scylladb/seastar,stamhe/seastar,wildinto/scylla,flashbuckets/seastar,glommer/scylla,respu/scylla,kjniemi/scylla,kjniemi/scylla,rluta/scylla,avikivity/seastar,acbellini/scylla,shyamalschandra/seastar,koolhazz/seastar,printedheart/seastar,guiquanz/scylla,syuu1228/seastar,tempbottle/scylla,bowlofstew/scylla,printedheart/seastar,dwdm/scylla,mixja/seastar,norcimo5/seastar,avikivity/scylla