code: public MockResponse removeHeader(String name) {
          name += ":";
          for (Iterator<String> i = headers.iterator(); i.hasNext(); ) {
              String header = i.next();
              if (name.regionMatches(true, 0, header, 0, name.length())) {
                  i.remove();
              }
          }
          return this;
      }
docs: Removes all headers named {@code name}.