Make code parameter from Bot/$deploy optional

[rahul1]

Long ago, the Bot resource only stored the source code, and the compiled code was set during $deploy

Now we store both the source and compiled code as Attachments on the Bot resource, so the code parameter on the $deploy operation is unncessary. We can make it optional and then deprecate in v4

[codyebberson]

Make optional: yes

Deprecate: any reason? just to simplify the API?

[rahul1]

Just to simplify the API. Or alternatively, have $deploy also accept the source code. Right now it's weird that it only accepts one of the two types of "code" linked to a Bot