Remove redundant info from workshop and talk data

[ananyo2012]

audience_type and category is not required. Remove them from their respective data files.

[bhansa]

@ananyo2012 you want to take it up and close it?

[ananyo2012]

Ok I will work on it

…

On Sun, Dec 1, 2019 at 11:19 AM Bharat Saraswat ***@***.***> wrote: Reopened #102 <#102>. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#102?email_source=notifications&email_token=ACQAER4JHCJBNPQA2BNME7TQWNF7VA5CNFSM4JMIBY5KYY3PNVWWK3TUL52HS4DFWZEXG43VMVCXMZLOORHG65DJMZUWGYLUNFXW5KTDN5WW2ZLOORPWSZGOVF3ZQWI#event-2843187289>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ACQAER53LWIP2OI4JIPZNDTQWNF7VANCNFSM4JMIBY5A> .