Revert "chore: allow browser maintainers to approve changelog edits" (#6627)

Author: pichlermarc

.github/CODEOWNERS

@@ -34,7 +34,3 @@ experimental/packages/web-common/ @open-telemetry/browser-maintainers @open-tele
 packages/opentelemetry-context-zone/ @open-telemetry/browser-maintainers @open-telemetry/javascript-approvers
 packages/opentelemetry-context-zone-peer-dep/ @open-telemetry/browser-maintainers @open-telemetry/javascript-approvers
 packages/opentelemetry-sdk-trace-web/ @open-telemetry/browser-maintainers @open-telemetry/javascript-approvers
-
-# Also SDK/instrumentation changelogs are co-owned:
-CHANGELOG.md  @open-telemetry/browser-maintainers @open-telemetry/javascript-approvers
-experimental/CHANGELOG.md  @open-telemetry/browser-maintainers @open-telemetry/javascript-approvers