Revert "[maven-release-plugin] prepare for next development iteration"

This reverts commit e470f40082f9b3e7737ed535c8ed7beb1cfa2af5.
Revert "[maven-release-plugin] prepare release 4.3.0-RC1"

This reverts commit e2c1fa6ab565b3c16c8216a999240e75a7a8c6b9.