sstables: remove unused class shared_file_random_access_reader
sstables: remove unused class shared_file_random_access_reader

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