Remove 31 dead CODEOWNERS rules

[DanielSwift1992]

Summary

Resolves 31 stale references in CODEOWNERS. The lines themselves were left unchanged while the paths they referenced disappeared from the tree.

Test

# a stale line
sed -n '499p' .github/CODEOWNERS

# tracked files under the referenced paths
git ls-files -- 'src/sentry_plugins/' 'static/app/components/quickTrace/' | wc -l

Additional information

I found this mismatch in your repo while analyzing public data with my tool: https://github.com/DanielSwift1992/gate. If you need more details, happy to share.

Legal Boilerplate

Look, I get it. The entity doing business as "Sentry" was incorporated in the State of Delaware in 2015 as Functional Software, Inc. and is gonna need some rights from me in order to utilize my contributions in this here PR. So here's the deal: I retain all rights, title and interest in and to my contributions, and by keeping this boilerplate intact I confirm that Sentry can use, modify, copy, and redistribute my contributions, under Sentry's choice of terms.