CI: remove broken contracts doc workflow

For this to be publishable via github pages we need to move it to its
own repository. Currently we can't build the docs with latest foundry so
removing this workflow temporarily to reduce CI noise.

See #2629 for more details.

README.md

@@ -3,7 +3,6 @@
 [![Build](https://github.com/EspressoSystems/espresso-sequencer/actions/workflows/build.yml/badge.svg)](https://github.com/EspressoSystems/espresso-sequencer/actions/workflows/build.yml)
 [![Test](https://github.com/EspressoSystems/espresso-sequencer/actions/workflows/test.yml/badge.svg)](https://github.com/EspressoSystems/espresso-sequencer/actions/workflows/test.yml)
 [![Docs rust](https://github.com/EspressoSystems/espresso-sequencer/actions/workflows/doc-rust.yml/badge.svg)](https://github.com/EspressoSystems/espresso-sequencer/actions/workflows/doc-rust.yml)
-[![Docs contracts](https://github.com/EspressoSystems/espresso-sequencer/actions/workflows/doc-contracts.yml/badge.svg)](https://github.com/EspressoSystems/espresso-sequencer/actions/workflows/doc-contracts.yml)
 [![Contracts](https://github.com/EspressoSystems/espresso-sequencer/actions/workflows/contracts.yml/badge.svg)](https://github.com/EspressoSystems/espresso-sequencer/actions/workflows/contracts.yml)
 [![Lint](https://github.com/EspressoSystems/espresso-sequencer/actions/workflows/lint.yml/badge.svg)](https://github.com/EspressoSystems/espresso-sequencer/actions/workflows/lint.yml)
 [![Audit](https://github.com/EspressoSystems/espresso-sequencer/actions/workflows/audit.yml/badge.svg)](https://github.com/EspressoSystems/espresso-sequencer/actions/workflows/audit.yml)