OWNERS: Remove timflannagan as a reviewer

[timflannagan]

Description of the change:

Motivation for the change:

Reviewer Checklist

• Implementation matches the proposed design, or proposal is updated to match implementation
• Sufficient unit test coverage
• Sufficient end-to-end test coverage
• Docs updated or added to /docs
• Commit messages sensible and descriptive

[codecov]

Codecov Report

Merging #1042 (e076a26) into master (8959418) will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1042      +/-   ##
==========================================
+ Coverage   51.95%   51.96%   +0.01%     
==========================================
  Files         102      102              
  Lines        9215     9215              
==========================================
+ Hits         4788     4789       +1     
+ Misses       3514     3513       -1     
  Partials      913      913              

Impacted Files	Coverage Δ
alpha/veneer/semver/semver.go	60.50% <0.00%> (+0.50%)	⬆️

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[grokspawn]

/approve
/lgtm
😢

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: grokspawn, timflannagan

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• OWNERS [grokspawn]

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