Revert "[maven-release-plugin] prepare release 6.2.0-ga1"

This reverts commit 0c4460357cb29b33dadd178e54879f38b596c718.
Revert "Prepare 6.2.0-ga1 release."

This reverts commit 3f5249fe0a10a424d0894958c9fb11b1454c970b.