Ability to remove embed snippets

[Tomas2D]

When code snippets are large, editing the source markdown document becomes hard.
Therefore, I would like to be able to reset (unembed) code snippets and insert (embed) them once I have a final version.

[zakhenry]

Yea this sounds useful, maybe a flag --remove-code or similar. I'd accept a PR to this effect :)

[Tomas2D]

Feel free to assign this issue to me then.