Disable the monitor-components workflow in msft-git

It really does not make sense to run that workflow in any fork of
git-for-windows/git. Typically, it is enough to simply disable it (since
it is a scheduled workflow, it is disabled by default in any new fork).

However, in microsoft/git, we switch the default branch whenever we
rebase to a new upstream version, and every time we do so, this
scheduled workflow gets re-enabled.

Let's just delete it in microsoft/git and never be bothered by it again.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>