def removeUnwantedHeaders(allHeadersContent):
    """ remove unwanted headers, e.g. the ones used for dictionaries but not desirable in the pch
   """
    unwantedHeaders = []
    deprecatedHeaders = ['']
    unwantedHeaders.extend(deprecatedHeaders)
    for unwantedHeader in unwantedHeaders:
        allHeadersContent = allHeadersContent.replace('#include "%s"' %
            unwantedHeader, '')
    return allHeadersContent
