remove deprecated code
remove deprecated code

As of 0.7.0, we do no longer support creating matrices without brackets.
See issue 930.

Signed-off-by: Vinzent Steinberg <7ad6f2e9b818e1205d2345ebad99449e257d29e3@gmail.com>
Signed-off-by: Ondrej Certik <b816faa87b7d35274d2e545c5be11ed4376f3ccf@certik.cz>

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