code: public static String removeEmojis(
      String str,
      final Collection<Emoji> emojisToRemove
    ) {
      EmojiTransformer emojiTransformer = new EmojiTransformer() {
        public String transform(UnicodeCandidate unicodeCandidate) {
          if (!emojisToRemove.contains(unicodeCandidate.getEmoji())) {
            return unicodeCandidate.getEmoji().getUnicode() +
              unicodeCandidate.getFitzpatrickUnicode();
          }
          return "";
        }
      };
  
      return parseFromUnicode(str, emojiTransformer);
    }
docs: Removes a set of emojis from a String
  
  @param str            the string to process
  @param emojisToRemove the emojis to remove from this string
  
  @return the string without the emojis that were removed