Remove unneeded import os from intsets
Remove unneeded import os from intsets

jfhg/Nim,Matt14916/Nim,Salafit/Nim,greyanubis/Nim,msmith491/Nim,douglas-larocca/Nim,JCavallo/Nim,mbaulch/Nim,zachaysan/Nim,nanoant/Nim,nafsaka/Nim,Dhertz/Nim,haiodo/Nim,douglas-larocca/Nim,douglas-larocca/Nim,MrJohz/Nim,jsanjuas/Nim,jfhg/Nim,Matt14916/Nim,msmith491/Nim,singularperturbation/Nim,nafsaka/Nim,mbaulch/Nim,greyanubis/Nim,Matt14916/Nim,haiodo/Nim,xland/Nim,tulayang/Nim,msmith491/Nim,endragor/Nim,nafsaka/Nim,zachaysan/Nim,douglas-larocca/Nim,gokr/Nim,gokr/Nim,tmm1/Nim,JCavallo/Nim,jsanjuas/Nim,russpowers/Nim,BlaXpirit/nim,reactormonk/nim,judofyr/Nim,fmamud/Nim,xland/Nim,sarvex/Nim-lang,kirbyfan64/Nim,kirbyfan64/Nim,sarvex/Nim-lang,jfhg/Nim,sarvex/Nim-lang,nanoant/Nim,sferik/Nim,MrJohz/Nim,nimLuckyBull/Nim,Dhertz/Nim,tulayang/Nim,sferik/Nim,tmm1/Nim,sferik/Nim,Salafit/Nim,nafsaka/Nim,fmamud/Nim,sferik/Nim,judofyr/Nim,judofyr/Nim,nanoant/Nim,sarvex/Nim-lang,greyanubis/Nim,msmith491/Nim,nimLuckyBull/Nim,BlaXpirit/nim,xland/Nim,gokr/Nim,reactormonk/nim,nimLuckyBull/Nim,fredericksilva/Nim,fredericksilva/Nim,JCavallo/Nim,kirbyfan64/Nim,Dhertz/Nim,greyanubis/Nim,dom96/Nim,Salafit/Nim,Salafit/Nim,msmith491/Nim,russpowers/Nim,Salafit/Nim,dom96/Nim,greyanubis/Nim,gokr/Nim,BlaXpirit/nim,haiodo/Nim,bvssvni/Nim,xland/Nim,nafsaka/Nim,Senketsu/Nim,dom96/Nim,JCavallo/Nim,Senketsu/Nim,bvssvni/Nim,Senketsu/Nim,singularperturbation/Nim,fredericksilva/Nim,mbaulch/Nim,jfhg/Nim,BlaXpirit/nim,nanoant/Nim,nimLuckyBull/Nim,BlaXpirit/nim,bvssvni/Nim,jsanjuas/Nim,haiodo/Nim,JCavallo/Nim,judofyr/Nim,Senketsu/Nim,sferik/Nim,reactormonk/nim,zachaysan/Nim,tulayang/Nim,jfhg/Nim,singularperturbation/Nim,Matt14916/Nim,bvssvni/Nim,tulayang/Nim,Dhertz/Nim,zachaysan/Nim,BlaXpirit/nim,Senketsu/Nim,jfhg/Nim,nimLuckyBull/Nim,JCavallo/Nim,msmith491/Nim,reactormonk/nim,nanoant/Nim,jsanjuas/Nim,Dhertz/Nim,sferik/Nim,xland/Nim,tmm1/Nim,BlaXpirit/nim,dom96/Nim,fredericksilva/Nim,judofyr/Nim,endragor/Nim,jsanjuas/Nim,MrJohz/Nim,douglas-larocca/Nim,zachaysan/Nim,tulayang/Nim,endragor/Nim,sferik/Nim,zachaysan/Nim,singularperturbation/Nim,greyanubis/Nim,jsanjuas/Nim,sferik/Nim,jsanjuas/Nim,tmm1/Nim,russpowers/Nim,fmamud/Nim,reactormonk/nim,mbaulch/Nim,Senketsu/Nim,nanoant/Nim,Matt14916/Nim,russpowers/Nim,Dhertz/Nim,endragor/Nim,douglas-larocca/Nim,dom96/Nim,haiodo/Nim,haiodo/Nim,nimLuckyBull/Nim,judofyr/Nim,judofyr/Nim,kirbyfan64/Nim,sarvex/Nim-lang,singularperturbation/Nim,msmith491/Nim,kirbyfan64/Nim,douglas-larocca/Nim,reactormonk/nim,haiodo/Nim,dom96/Nim,Dhertz/Nim,reactormonk/nim,gokr/Nim,endragor/Nim,tulayang/Nim,endragor/Nim,MrJohz/Nim,reactormonk/nim,zachaysan/Nim,nafsaka/Nim,sarvex/Nim-lang,BlaXpirit/nim,fmamud/Nim,greyanubis/Nim,fredericksilva/Nim,douglas-larocca/Nim,bvssvni/Nim,mbaulch/Nim,mbaulch/Nim,tmm1/Nim,bvssvni/Nim,nanoant/Nim,kirbyfan64/Nim,Salafit/Nim,MrJohz/Nim,Matt14916/Nim,fmamud/Nim,xland/Nim,tmm1/Nim,JCavallo/Nim,Senketsu/Nim,bvssvni/Nim,Matt14916/Nim,Salafit/Nim,fmamud/Nim,MrJohz/Nim,fredericksilva/Nim,mbaulch/Nim,russpowers/Nim,fmamud/Nim,singularperturbation/Nim,russpowers/Nim,tmm1/Nim,gokr/Nim,sarvex/Nim-lang,kirbyfan64/Nim,gokr/Nim,judofyr/Nim,dom96/Nim,endragor/Nim,russpowers/Nim,jfhg/Nim,gokr/Nim,singularperturbation/Nim,MrJohz/Nim,nimLuckyBull/Nim,xland/Nim,fredericksilva/Nim,nafsaka/Nim,kirbyfan64/Nim,fredericksilva/Nim