GH-139436: Remove references to downloadable PDF documentation (#140416)

Author: AA-Turner

Doc/faq/general.rst

@@ -186,7 +186,7 @@ How do I get documentation on Python?
 -------------------------------------
 
 The standard documentation for the current stable version of Python is available
-at https://docs.python.org/3/.  PDF, plain text, and downloadable HTML versions are
+at https://docs.python.org/3/.  EPUB, plain text, and downloadable HTML versions are
 also available at https://docs.python.org/3/download.html.
 
 The documentation is written in reStructuredText and processed by `the Sphinx

README.rst

@@ -153,7 +153,7 @@ Documentation
 updated daily.
 
 It can also be downloaded in many formats for faster access.  The documentation
-is downloadable in HTML, PDF, and reStructuredText formats; the latter version
+is downloadable in HTML, EPUB, and reStructuredText formats; the latter version
 is primarily for documentation authors, translators, and people with special
 formatting requirements.
 
@@ -232,4 +232,4 @@ This Python distribution contains *no* GNU General Public License (GPL) code,
 so it may be used in proprietary projects.  There are interfaces to some GNU
 code but these are entirely optional.
 
-All trademarks referenced herein are property of their respective holders.
+All trademarks referenced herein are property of their respective holders.