"A printer-friendly PDF version of this manual is also available." is a lie

[YarikTH]

Many of "DocBook XSL Stylesheets V1.79.1" based documentation refers to pdf documentation.

For example https://www.boost.org/doc/libs/1_82_0/libs/type_traits/doc/html/index.html

While last update of such documentation was in v1.56.0 2014-08-14

Maybe it worth to find all such mentions and remove them if pdf documentation is no longer provided.

[YarikTH]

The same link on the downloads page https://www.boost.org/users/download/