Revert "Prepare 6.2.0-GA1 release."

This reverts commit c5f669361d4f7514841b37813f5f479a26404401.
Revert "[maven-release-plugin] prepare release 6.2.0-ga1"

This reverts commit 15724cb77568c11fcb78660dea944f56a2e02395.
Revert "Prepare 6.2.0-GA1 release."

This reverts commit 7ad5431eca4a73c87bd2f2483eb6f4e5006f3036.