Removed unused imports in polytools.py
Removed unused imports in polytools.py

Arafatk/sympy,Designist/sympy,kmacinnis/sympy,hargup/sympy,hargup/sympy,atsao72/sympy,ga7g08/sympy,abloomston/sympy,VaibhavAgarwalVA/sympy,iamutkarshtiwari/sympy,drufat/sympy,rahuldan/sympy,vipulroxx/sympy,Sumith1896/sympy,Gadal/sympy,asm666/sympy,sampadsaha5/sympy,oliverlee/sympy,kmacinnis/sympy,sahmed95/sympy,asm666/sympy,Gadal/sympy,Sumith1896/sympy,jaimahajan1997/sympy,ChristinaZografou/sympy,debugger22/sympy,AkademieOlympia/sympy,abhiii5459/sympy,Davidjohnwilson/sympy,kaichogami/sympy,lindsayad/sympy,jamesblunt/sympy,kaushik94/sympy,wyom/sympy,VaibhavAgarwalVA/sympy,emon10005/sympy,yashsharan/sympy,Arafatk/sympy,madan96/sympy,abloomston/sympy,kumarkrishna/sympy,atreyv/sympy,Titan-C/sympy,Designist/sympy,jbbskinny/sympy,kmacinnis/sympy,hrashk/sympy,shipci/sympy,postvakje/sympy,jamesblunt/sympy,garvitr/sympy,Curious72/sympy,jerli/sympy,oliverlee/sympy,sunny94/temp,toolforger/sympy,kumarkrishna/sympy,moble/sympy,kaushik94/sympy,aktech/sympy,debugger22/sympy,wanglongqi/sympy,ChristinaZografou/sympy,liangjiaxing/sympy,farhaanbukhsh/sympy,cswiercz/sympy,saurabhjn76/sympy,MechCoder/sympy,pbrady/sympy,MridulS/sympy,abhiii5459/sympy,Vishluck/sympy,liangjiaxing/sympy,beni55/sympy,Vishluck/sympy,AunShiLord/sympy,ahhda/sympy,souravsingh/sympy,Shaswat27/sympy,rahuldan/sympy,Shaswat27/sympy,MechCoder/sympy,maniteja123/sympy,kaushik94/sympy,diofant/diofant,ahhda/sympy,iamutkarshtiwari/sympy,ga7g08/sympy,hrashk/sympy,VaibhavAgarwalVA/sympy,Mitchkoens/sympy,shikil/sympy,Curious72/sympy,wanglongqi/sympy,cswiercz/sympy,lidavidm/sympy,kevalds51/sympy,kumarkrishna/sympy,meghana1995/sympy,hargup/sympy,garvitr/sympy,souravsingh/sympy,Arafatk/sympy,aktech/sympy,skidzo/sympy,shipci/sympy,mcdaniel67/sympy,grevutiu-gabriel/sympy,mcdaniel67/sympy,atsao72/sympy,Davidjohnwilson/sympy,bukzor/sympy,AkademieOlympia/sympy,Gadal/sympy,sahilshekhawat/sympy,Curious72/sympy,flacjacket/sympy,vipulroxx/sympy,vipulroxx/sympy,mafiya69/sympy,yashsharan/sympy,cswiercz/sympy,kevalds51/sympy,kevalds51/sympy,chaffra/sympy,drufat/sympy,hrashk/sympy,sampadsaha5/sympy,MridulS/sympy,toolforger/sympy,wyom/sympy,cccfran/sympy,oliverlee/sympy,asm666/sympy,cccfran/sympy,ga7g08/sympy,chaffra/sympy,pandeyadarsh/sympy,garvitr/sympy,sampadsaha5/sympy,moble/sympy,wanglongqi/sympy,lidavidm/sympy,lidavidm/sympy,beni55/sympy,sahilshekhawat/sympy,aktech/sympy,dqnykamp/sympy,madan96/sympy,bukzor/sympy,yukoba/sympy,yukoba/sympy,mafiya69/sympy,meghana1995/sympy,jaimahajan1997/sympy,pandeyadarsh/sympy,amitjamadagni/sympy,Vishluck/sympy,debugger22/sympy,sahilshekhawat/sympy,jerli/sympy,mafiya69/sympy,pbrady/sympy,meghana1995/sympy,beni55/sympy,pbrady/sympy,chaffra/sympy,postvakje/sympy,MridulS/sympy,farhaanbukhsh/sympy,jbbskinny/sympy,maniteja123/sympy,atsao72/sympy,yashsharan/sympy,abloomston/sympy,shipci/sympy,AkademieOlympia/sympy,sahmed95/sympy,sahmed95/sympy,atreyv/sympy,Titan-C/sympy,atreyv/sympy,Davidjohnwilson/sympy,souravsingh/sympy,amitjamadagni/sympy,toolforger/sympy,lindsayad/sympy,saurabhjn76/sympy,shikil/sympy,Mitchkoens/sympy,sunny94/temp,Sumith1896/sympy,drufat/sympy,ChristinaZografou/sympy,MechCoder/sympy,Mitchkoens/sympy,grevutiu-gabriel/sympy,Designist/sympy,bukzor/sympy,emon10005/sympy,lindsayad/sympy,jerli/sympy,dqnykamp/sympy,iamutkarshtiwari/sympy,maniteja123/sympy,pandeyadarsh/sympy,sunny94/temp,cccfran/sympy,AunShiLord/sympy,jaimahajan1997/sympy,liangjiaxing/sympy,yukoba/sympy,moble/sympy,kaichogami/sympy,madan96/sympy,Shaswat27/sympy,jamesblunt/sympy,wyom/sympy,dqnykamp/sympy,saurabhjn76/sympy,jbbskinny/sympy,skidzo/sympy,AunShiLord/sympy,skidzo/sympy,grevutiu-gabriel/sympy,Titan-C/sympy,mcdaniel67/sympy,rahuldan/sympy,ahhda/sympy,shikil/sympy,skirpichev/omg,farhaanbukhsh/sympy,emon10005/sympy,abhiii5459/sympy,postvakje/sympy,kaichogami/sympy,srjoglekar246/sympy