Remove mention of deprecated xreadlines method.
diff --git a/Doc/lib/libgzip.tex b/Doc/lib/libgzip.tex
index 7a526b6..b4cc659 100644
--- a/Doc/lib/libgzip.tex
+++ b/Doc/lib/libgzip.tex
@@ -21,8 +21,8 @@
\begin{classdesc}{GzipFile}{\optional{filename\optional{, mode\optional{,
compresslevel\optional{, fileobj}}}}}
Constructor for the \class{GzipFile} class, which simulates most of
-the methods of a file object, with the exception of the \method{readinto()},
-\method{truncate()}, and \method{xreadlines()} methods. At least one of
+the methods of a file object, with the exception of the \method{readinto()}
+and \method{truncate()} methods. At least one of
\var{fileobj} and \var{filename} must be given a non-trivial value.
The new class instance is based on \var{fileobj}, which can be a