request: remove the message about miniflare falling back to an older version of the runtime

[threepointone]

Describe the solution

Folks use the compatibility date not as a direct version number, but as an indicator of "give me all the features before this time". I think it's fine to not show the fallback message "The latest compatibility date supported by the installed Cloudflare Workers Runtime is "2023-08-14", but you've requested "2023-08-17". Falling back to "2023-08-14"..." It's just visual noise.

More importantly, folks who make a new project will almost ALWAYS see it, which can be confusing for folks starting off. It's not useful, so please remove it?

[Cherry]

Related: cloudflare/miniflare#666

Agreed, this is very weird and confusing when advice for years has been to just "use today's date" on new projects.

[petebacondarwin]

There is a valid reason for this message, although I think that it could be delivered better. See cloudflare/miniflare#666 (comment)

Closing as a duplicate of that issue over on Miniflare.