doc: Remove documentation of AIX 4 as a supported platform.

* doc/gnulib-intro.texi (Target Platforms): Mention that AIX 4 is
unsupported.
* doc/posix-functions/nanosleep.texi: Don't mention AIX 4 specific
workarounds.
* doc/posix-functions/strnlen.texi: Likewise.
* doc/posix-headers/inttypes.texi: Likewise.
* doc/**/*.texi: Update.

2 files changed, 2 insertions, 5 deletions

diff --git a/doc/posix-headers/fcntl.texi b/doc/posix-headers/fcntl.texi
index d6b4a79d76..6249b1c80f 100644
--- a/doc/posix-headers/fcntl.texi
+++ b/doc/posix-headers/fcntl.texi
@@ -72,8 +72,7 @@ IRIX 6.5, Solaris 11 2010-11, Cygwin 1.7.1, mingw, MSVC 14.
 @samp{AT_FDCWD}, @samp{AT_EACCESS}, @samp{AT_SYMLINK_NOFOLLOW},
 @samp{AT_SYMLINK_FOLLOW}, and @samp{AT_REMOVEDIR}
 are not defined on many platforms:
-glibc 2.3.6, Mac OS X 10.5, FreeBSD 6.0, NetBSD 5.0, OpenBSD 3.8, AIX
-5.1, HP-UX 11, IRIX 6.5, Cygwin 1.5.x, mingw, MSVC 14.
+glibc 2.3.6, Mac OS X 10.5, FreeBSD 6.0, NetBSD 5.0, OpenBSD 3.8, AIX 5.1, HP-UX 11, IRIX 6.5, Cygwin 1.5.x, mingw, MSVC 14.
 
 @item
 @samp{AT_FDCWD} is defined with a value too large for an @code{int} on some
diff --git a/doc/posix-headers/inttypes.texi b/doc/posix-headers/inttypes.texi
index 16cbfca30f..885e564e4d 100644
--- a/doc/posix-headers/inttypes.texi
+++ b/doc/posix-headers/inttypes.texi
@@ -13,15 +13,13 @@ MSVC 9.
 @item
 This header file is very incomplete on some platforms.
 @item
-The PRI* macros are defined to non-string values on AIX 4.3.3.
-@item
 The declarations of @code{imaxabs} and @code{imaxdiv} are missing on some
 platforms:
 NetBSD 3.0, OpenBSD 3.8, AIX 5.1, HP-UX 11, IRIX 6.5.
 @item
 The declarations of @code{strtoimax} and @code{strtoumax} are missing on some
 platforms:
-OpenBSD 3.8, AIX 4.3.2, AIX 5.1 (missing only @code{strtoumax}).
+OpenBSD 3.8, AIX 5.1 (missing only @code{strtoumax}).
 @item
 On some hosts that predate C++11, when using C++ one must define
 @code{__STDC_FORMAT_MACROS} to make visible the declarations of format