Revert "[maven-release-plugin] prepare release 3.0.0-M1" This reverts commit 766a946a8db4b7b7fe0f51e70264a8dbd76ffb45. Conflicts: coap/pom.xml codec/pom.xml core/pom.xml distribution/pom.xml examples/pom.xml http/pom.xml pom.xml protobuf/pom.xml thrift/pom.xml