gnus-treat-strip-banner

gnus-treat-strip-banner is a variable defined in `gnus-art.el'.
Its value is

t

Documentation:
Strip banners from articles.
The banner to be stripped is specified in the `banner' group parameter.
Valid values are nil, t, `head', `first', `last', an integer or a
predicate. See Info node `(gnus)Customizing Articles'.

You can customize this variable.