code: @Delete("/metadata/{projectName}/members/{memberId}")
      public CompletableFuture<Revision> removeMember(@Param("projectName") String projectName,
                                                      @Param("memberId") String memberId,
                                                      Author author) {
          final User member = new User(loginNameNormalizer.apply(urlDecode(memberId)));
          return mds.getMember(projectName, member)
                    .thenCompose(unused -> mds.removeMember(author, projectName, member));
      }
docs: DELETE /metadata/{projectName}/members/{memberId}
  
  <p>Removes the specified {@code memberId} from the specified {@code projectName}.