atomic_cell_base: remove unused function is_dead()
atomic_cell_base: remove unused function is_dead()

Signed-off-by: Paweł Dziepak <e29bb3265626c60caf76d587cabdfcd8b379ef80@cloudius-systems.com>

victorbriz/scylla,linearregression/scylla,avikivity/scylla,avikivity/scylla,phonkee/scylla,respu/scylla,kjniemi/scylla,senseb/scylla,avikivity/scylla,asias/scylla,justintung/scylla,duarten/scylla,phonkee/scylla,raphaelsc/scylla,gwicke/scylla,victorbriz/scylla,capturePointer/scylla,rentongzhang/scylla,justintung/scylla,victorbriz/scylla,justintung/scylla,scylladb/scylla,scylladb/scylla,aruanruan/scylla,wildinto/scylla,tempbottle/scylla,kjniemi/scylla,linearregression/scylla,tempbottle/scylla,guiquanz/scylla,dwdm/scylla,raphaelsc/scylla,scylladb/scylla,stamhe/scylla,guiquanz/scylla,raphaelsc/scylla,eklitzke/scylla,dwdm/scylla,kangkot/scylla,rluta/scylla,shaunstanislaus/scylla,respu/scylla,acbellini/scylla,acbellini/scylla,stamhe/scylla,bowlofstew/scylla,glommer/scylla,respu/scylla,glommer/scylla,wildinto/scylla,rluta/scylla,kangkot/scylla,asias/scylla,kangkot/scylla,aruanruan/scylla,bowlofstew/scylla,duarten/scylla,shaunstanislaus/scylla,senseb/scylla,kjniemi/scylla,dwdm/scylla,guiquanz/scylla,tempbottle/scylla,gwicke/scylla,stamhe/scylla,rentongzhang/scylla,rentongzhang/scylla,capturePointer/scylla,senseb/scylla,rluta/scylla,wildinto/scylla,phonkee/scylla,eklitzke/scylla,glommer/scylla,linearregression/scylla,eklitzke/scylla,shaunstanislaus/scylla,scylladb/scylla,bowlofstew/scylla,aruanruan/scylla,asias/scylla,capturePointer/scylla,duarten/scylla,acbellini/scylla,gwicke/scylla