public boolean removeGroup(final String groupId) {
        Requires.requireTrue(!StringUtils.isBlank(groupId), "Blank group id");

        return this.groupConfTable.remove(groupId) != null;
    }
Remove the group from route table.

@param groupId raft group id
@return true on success
jraft-core/src/main/java/com/alipay/sofa/jraft/RouteTable.java