2205: Remove 'signature' option for undefined functions.
2205: Remove 'signature' option for undefined functions.

This attribute was completely unused and undocumented.

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