code: public <T> AsyncMutateInBuilder remove(String path) {
          if (StringUtil.isNullOrEmpty(path)) {
              throw new IllegalArgumentException("Path must not be empty for remove");
          }
          this.mutationSpecs.add(new MutationSpec(Mutation.DELETE, path, null));
          return this;
      }
docs: Remove an entry in a JSON document (scalar, array element, dictionary entry,
  whole array or dictionary, depending on the path).
  
  @param path the path to remove.