Remove spanmetricsprocessor

[atoulme]

Component(s)

processor/spanmetrics

Describe the issue you're reporting

The spanmetrics processor has been deprecated since March 17, 2023 with #19751.

This issue tracks its eventual removal from the repository.

[github-actions]

Pinging code owners:

• processor/spanmetrics: @albertteoh

See Adding Labels via Comments if you do not have permissions to add labels yourself.

[github-actions]

Pinging code owners for processor/spanmetrics: @albertteoh. See Adding Labels via Comments if you do not have permissions to add labels yourself.

[atoulme]

This was discussed in the SIG meeting of 11/29.

[crobert-1]

To add context, there's no given requirement around how long the component will still be in future releases, the minimum requirement is at least two minor releases. The definition of Deprecated is that it's planed to be removed in a future version, so it makes sense that we'll remove it at some point.

The main concern is communicating to users this plan so they move to the connector instead. As stated in description, it has been deprecated for a while, so we may just have to state a specific date or release that it will be removed in as motivation for users to make the move. Just a suggestion though, others may have more effective ideas.

[github-actions]

This issue has been inactive for 60 days. It will be closed in 60 days if there is no activity. To ping code owners by adding a component label, see Adding Labels via Comments, or if you are unsure of which component this issue relates to, please ping @open-telemetry/collector-contrib-triagers. If this issue is still relevant, please ping the code owners or leave a comment explaining why it is still relevant. Otherwise, please close it.

Pinging code owners:

• processor/spanmetrics: @albertteoh

See Adding Labels via Comments if you do not have permissions to add labels yourself.

[mx-psi]

I propose we remove this on the first release on March, which gives roughly one year of deprecation period. Would that be okay with everyone @open-telemetry/collector-contrib-approvers ?

[atoulme]

I think this processor is now unmaintained as well, fwiw.