public RequestTemplate removeHeader(String name) {
    if (name == null || name.isEmpty()) {
      throw new IllegalArgumentException("name is required.");
    }
    this.headers.remove(name);
    return this;
  }
Clear on reader from {@link RequestTemplate}

@param name of the header.
@return a RequestTemplate for chaining.
core/src/main/java/feign/RequestTemplate.java