Remove redundant secret exposure in Maven publish workflow (#1624)

* Initial plan

* Remove redundant env block from Maven Central publish step

Co-authored-by: gcatanese <1771700+gcatanese@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: gcatanese <1771700+gcatanese@users.noreply.github.com>

Author: Copilot

.github/workflows/publish.yml

@@ -34,7 +34,3 @@ jobs:
 
     - name: Publish to Apache Maven Central
       run: mvn deploy
-      env:
-        MAVEN_USERNAME: ${{ secrets.SONATYPE_CENTRAL_PORTAL_USERNAME}}
-        MAVEN_CENTRAL_TOKEN: ${{ secrets.SONATYPE_CENTRAL_PORTAL_PASSWORD }}
-        MAVEN_GPG_PASSPHRASE: ${{ secrets.MAVEN_GPG_PASSPHRASE }}