Revert "[application] ltfschoen" (#21)

Reverts #6

Just double checked the recency of the contributions to the relevant
projects, and none of them are recent:
-
https://github.com/polkadot-js/apps/pulls?q=is%3Apr+author%3Altfschoen+is%3Aclosed:
2022
-
https://github.com/polkadot-js/common/pulls?q=is%3Apr+author%3Altfschoen+is%3Aclosed:
2018
-
https://github.com/polkadot-api/polkadot-api/pulls?q=is%3Apr+author%3Altfschoen+is%3Aclosed:
recent, but MR was not accepted.
- https://github.com/paritytech/subxt/issues?q=author:ltfschoen: issues
raised, but no MR.

Sorry to revert this, please apply on-chain once the collective is live
and you have more recent contributions.