Follow-up: Remove sed command that overwrites compiled VSCode Workbench module

MR: refactor: handle packaged node_modules (!400 - merged)

The following discussion from !394 (merged) should be addressed:

• @pslaughter started a discussion: (+4 comments)

  question: Oh man, this one is tricky :/

  I'm really nervous about string replacing something across the compiled .js. It's a big assumption that this is safe... What if we didn't try to move things over to bundled_node_modules? It's probably safer if we try to preserve the structure of the package. WDYT? Maybe we can try pairing on this?