Remove scaffolds that don't support stable cadence

[chasefleming]

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For contributor use:

• [ ] Targeted PR against master branch
• [ ] Linked to Github issue with discussion and accepted design OR link to spec that describes this work
• [ ] Code follows the standards mentioned here
• [ ] Updated relevant documentation
• [ ] Re-reviewed Files changed in the Github PR explorer
• [ ] Added appropriate labels

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 33.91%. Comparing base (a47f410) to head (0826b71).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## feature/stable-cadence #1649 +/- ## ======================================================= Coverage 33.91% 33.91% ======================================================= Files 100 100 Lines 6222 6222 ======================================================= Hits 2110 2110 Misses 3828 3828 Partials 284 284 ``` | [Flag](https://app.codecov.io/gh/onflow/flow-cli/pull/1649/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=onflow) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/onflow/flow-cli/pull/1649/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=onflow) | `33.91% <ø> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=onflow#carryforward-flags-in-the-pull-request-comment) to find out more.

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