Remove last remaining traces of modelMetricsNamespace flag

[alexcreasy]

Description

Removes a few orphaned references to the removed modelMetricsNamespace flag.

How Has This Been Tested?

Test Impact

Request review criteria:

Self checklist (all need to be checked):

• The developer has manually tested the changes and verified that the changes work
• Commits have been squashed into descriptive, self-contained units of work (e.g. 'WIP' and 'Implements feedback' style messages have been removed)
• Testing instructions have been added in the PR body (for PRs involving changes that are not immediately obvious).
• The developer has added tests or explained why testing cannot be added (unit tests & storybook for related changes)

If you have UI changes:

• Included any necessary screenshots or gifs if it was a UI change.
• Included tags to the UX team if it was a UI/UX change (find relevant UX in the SMEs section).

After the PR is posted & before it merges:

• The developer has tested their solution on a cluster by using the image produced by the PR to main

[andrewballantyne]

Oh, you broke tests... no approval for you 🙂

[lucferbux]

@alexcreasy should we merge this? it's been open for a couple of months

[andrewballantyne]

/retest

[andrewballantyne]

Okay, GitHub allowed a rebase -- the test info was lost and seemed to not want me to retest it -- so I figured this way we can try to merge this if the tests pass.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.11%. Comparing base (95611b7) to head (dd0dca3).

❗ Current head dd0dca3 differs from pull request most recent head 0cd4f81. Consider uploading reports for the commit 0cd4f81 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2438      +/-   ##
==========================================
- Coverage   78.14%   78.11%   -0.04%     
==========================================
  Files        1076     1076              
  Lines       22629    22615      -14     
  Branches     5722     5718       -4     
==========================================
- Hits        17684    17665      -19     
- Misses       4945     4950       +5     

Files	Coverage Δ
frontend/src/concepts/areas/types.ts	100.00% <ø> (ø)

... and 12 files with indirect coverage changes

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[andrewballantyne]

Seems to not be on Alex's radar -- going to merge as-is, it's minor cleanup.

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: andrewballantyne

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