Deprecating umd on Installl modal

# Feature Request
We want to simplify our build tools and process, as part of the new multichain code-path we figured out that we're bundling the install modal package for CJS, ESM and UMD.

## Reasoning
We no longer see the need to have UMD as part of install modal. Our SDK is already bundling for UMD.
It would be good to prove it, but so far its a little obvious that our multichain SDK is built already for UMD so, I don't see a reason why we should keep umd in install modal.

Is the install modal used directly by other users in UMD format? I don't think so, but worth answering.