version/instance should be removed when transformed to TD

[egekorkan]

Currently, after the TD is generated, it still has the version/instance in the root level. It should be removed in the process.

[yashgoyal0110]

@egekorkan
Please assign this to me.

[egekorkan]

Thinking further, there is a gap in the spec about what the behavior should be.

• If there is no version field in a TM, generated TD should have no version automatically. If the user wants it, they can add it.
• If there is version field in a TM, it doesn't have anything mandatory. However, it cannot have instance. Typically, it has model. In that case, the "To TD" button must guide the user. The user can put a value for instance, a unique id/timestamp can be generated or the version object can be removed. The default behavior can be the auto-generated id/timestamp as a placeholder.

[egekorkan]

@yashgoyal0110 do you plan to work on this btw?

[TejInaco]

Issue solve in PR #162