Explore removing rather than blanking lines inside remove_env_simnet #2274
Description
Is your feature request related to a problem? Please describe.
The current PR for #2022 leaves empty lines behind when removing code annotated as #[env(simnet)]. This is because if we remove the lines fully, the spans in the remaining code are shifted, which breaks the LSP.
Describe the solution you'd like
Remove the lines fully while keeping the spans correct for when the lines are not removed.
Describe alternatives you've considered
Doing the removal inside stacks-core. This is difficult, because the relevant code ignores comments entirely, not to mention the difficulty in updating stacks-core.