code: def strip_tashkeel(text):
      
      if not text:
          return text
      elif is_vocalized(text):
          for char in TASHKEEL:
              text = text.replace(char, '')
      return text
docs: Strip vowels from a text,  include Shadda.
      The striped marks are :
          - FATHA,  DAMMA,  KASRA
          - SUKUN
          - SHADDA
          - FATHATAN,  DAMMATAN,  KASRATAN,  ,  ,  .
  
      @param text: arabic text.
      @type text: unicode.
      @return: return a striped text.
      @rtype: unicode.