Python: Remover Doctype HTML usando Beautifulsoup4

Solução convencional

from bs4 import BeautifulSoup, Doctype

for item in soup.contents:
    if isinstance(item, Doctype):
        item.extract()

Solução listcomp

from bs4 import BeautifulSoup, Doctype

[x.extract() for x in soup.contents if isinstance(x, Doctype)]