Remove a lot of unused code, related to:
* **Support for older versions of `elixir`**:
* Remove `openssl` 1.1
* Remove `elixir-ls` repository
* Remove script to install pinned versions of `elixir-ls`
* **Unused tools from `mise`**:
* `aqua:CircleCI-Public/circleci-cli`: This isn't my `ci/cd` service of choice.
* `aqua:xo/usql`: Even though this is interesting, I mainly interact with the default tooling of the databases.
* `go:github.com/bloznelis/typioca`: I go for the `tukai` or `ttyper` to improve my keyboard profecience
* `pipx:vectorcode`: I've never really used it.
* In this case, I also removed the `neovim` plugin and `mcp` server.
* `ubi:block/goose`: I go for the `opencode`, or the specialized tools, such as `claude-code` or `gemini-cli`.
* `ubi:supabase/cli`: I've never really used it.
* `poetry`: I changed to `uv`.
Reviewed-on: #260
Co-authored-by: Joao P Dubas <joao.dubas+gitea@gmail.com>
Co-committed-by: Joao P Dubas <joao.dubas+gitea@gmail.com>