Revert "Throw a clear exception if OutputModule SelectEvents refers to a non-existent Path or Process"

[makortel]

Reverts #44767

Given the large number of related failures in IBs (also #44887, #44888)

[cmsbuild]

cms-bot internal usage

[cmsbuild]

+code-checks

Logs: https://cmssdt.cern.ch/SDT/code-checks/cms-sw-PR-44889/40151

• This PR adds an extra 12KB to repository

[cmsbuild]

A new Pull Request was created by @makortel for master.

It involves the following packages:

• FWCore/Framework (core)

@cmsbuild, @smuzaffar, @makortel, @Dr15Jones can you please review it and eventually sign? Thanks.
@missirol, @wddgit this is something you requested to watch as well.
@rappoccio, @antoniovilela, @sextonkennedy you are the release manager for this.

cms-bot commands are listed here

[makortel]

hold

@Dr15Jones spotted the likely culprit, I'm testing it now, so we might not need this revert after all.

[cmsbuild]

Pull request has been put on hold by @makortel
They need to issue an unhold command to remove the hold state or L1 can unhold it for all

[makortel]

Superseded by #44891