- Delete the old maven central release workflow and replace it with the new workflow which uses nexus staging plugin
- Delete the artifactory staging release workflow as it is no longer needed
- This was used to push the artifacts into repo.spring.io libs-staging-local before pushing into sonatype staging. With the nexus staging plugin, we directly push the artifacts into sonatype staging
- Delete maven central staging release workflow as it is no longer needed as well
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