Delete importer and prometheus metrics importer

What does this MR do and why?

Delete importer and prometheus metrics importer

Delete related usages of class

Delete related specs

Screenshots or screen recordings

NA

How to set up and validate locally

1. Pipeline should be
2. The deleted classes were not used anywhere except specs, so there is nothing major to verify.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #397139 (closed)

changed milestone to %16.3

added Category:Metrics backend devopsmonitor grouprespond maintenanceremoval missed:16.0 missed:16.1 priority1 sectionsec typemaintenance workflowblocked labels

assigned to @rkadam3

	1 Message
	CHANGELOG missing: If you want to create a changelog entry for GitLab FOSS, add the Changelog trailer to the commit message you want to add to the changelog. If you want to create a changelog entry for GitLab EE, also add the EE: true trailer to your commit message. If this merge request doesn't need a CHANGELOG entry, feel free to ignore this message.

If needed, you can retry the danger-review job that generated this comment.

Generated by Danger

@rkadam3 Some end-to-end (E2E) tests have been selected based on the stage label on this MR.

Please start the trigger-omnibus-and-follow-up-e2e job in the qa stage and ensure the tests in follow-up-e2e:package-and-test-ee pipeline are passing before this MR is merged. (The E2E test pipeline is computationally intensive and we cannot afford running it automatically for all pushes/rebases. Therefore, this job must be triggered manually after significant changes at least once.)

If you would like to run all E2E tests, please apply the pipeline:run-all-e2e label and trigger a new pipeline. This will run all tests in e2e:package-and-test pipeline.

The E2E test jobs are allowed to fail due to flakiness. For the list of known failures please refer to the latest pipeline triage issue.

Once done, please apply the emoji on this comment.

For any questions or help in reviewing the E2E test results, please reach out on the internal #quality Slack channel.

@splattael - Mind taking direct maintainer review on this one, please?

requested review from @splattael

Allure report

allure-report-publisher generated test report!

e2e-test-on-gdk: test report for 05762e1f

expand test summary

+------------------------------------------------------------------+
|                          suites summary                          |
+-------------+--------+--------+---------+-------+-------+--------+
|             | passed | failed | skipped | flaky | total | result |
+-------------+--------+--------+---------+-------+-------+--------+
| Monitor     | 4      | 0      | 0       | 0     | 4     | ✅     |
| Plan        | 47     | 0      | 0       | 6     | 47    | ❗     |
| Data Stores | 20     | 0      | 0       | 8     | 20    | ❗     |
| Create      | 38     | 0      | 0       | 13    | 38    | ❗     |
| Verify      | 8      | 0      | 0       | 2     | 8     | ❗     |
| Govern      | 34     | 0      | 0       | 9     | 34    | ❗     |
| Manage      | 12     | 0      | 1       | 12    | 13    | ❗     |
+-------------+--------+--------+---------+-------+-------+--------+
| Total       | 163    | 0      | 1       | 50    | 164   | ❗     |
+-------------+--------+--------+---------+-------+-------+--------+

marked the checklist item I have evaluated the MR acceptance checklist for this MR. as completed

approved this merge request

@splattael, thanks for approving this merge request.

This is the first time the merge request is approved. To ensure full test coverage, a new pipeline will be started shortly.

For more info, please refer to the following links:

• rspec predictive jobs
• jest predictive jobs
• merging a merge request.

added pipeline:mr-approved label

resolved all threads

enabled an automatic merge when the pipeline for d209ffb7 succeeds

merged

mentioned in commit ffef2d30

added workflowstaging-canary label and removed workflowblocked label

added workflowcanary label and removed workflowstaging-canary label

added workflowstaging label and removed workflowcanary label

added workflowproduction label and removed workflowstaging label

added workflowpost-deploy-db-staging label and removed workflowproduction label

added workflowpost-deploy-db-production label and removed workflowpost-deploy-db-staging label

mentioned in issue gitlab-org/monitor/respond#264 (closed)

added releasedcandidate label

added releasedpublished label and removed releasedcandidate label

mentioned in issue gitlab-org/monitor/respond#266 (closed)