Remove comments about unicode atoms in OTP 18

There was once a plan to implement support for unicode atoms in OTP
18. This plan has been stopped until further notice, and the
information about this is now removed from the documentation.

3 files changed, 11 insertions, 16 deletions

diff --git a/erts/doc/src/erl_ext_dist.xml b/erts/doc/src/erl_ext_dist.xml
index fa083db4c7..a6e7dddbed 100644
--- a/erts/doc/src/erl_ext_dist.xml
+++ b/erts/doc/src/erl_ext_dist.xml
@@ -126,9 +126,8 @@
     However, only characters that can be encoded using Latin1 (ISO-8859-1)
     are currently supported in atoms. The support for UTF-8 encoded atoms
     in the external format has been implemented in order to be able to support
-    all Unicode characters in atoms in <em>some future release</em>. Full
-    support for Unicode atoms will not happen before OTP-R18, and might
-    be introduced even later than that. Until full Unicode support for
+    all Unicode characters in atoms in <em>some future release</em>.
+    Until full Unicode support for
     atoms has been introduced, it is an <em>error</em> to pass atoms containing
     characters that cannot be encoded in Latin1, and <em>the behavior is
     undefined</em>.</p>
diff --git a/lib/stdlib/doc/src/unicode_usage.xml b/lib/stdlib/doc/src/unicode_usage.xml
index bebfbd4514..29b8940c62 100644
--- a/lib/stdlib/doc/src/unicode_usage.xml
+++ b/lib/stdlib/doc/src/unicode_usage.xml
@@ -50,12 +50,8 @@
   encoded files in several circumstances. Most notable is the support
   for UTF-8 in files read by <c>file:consult/1</c>, release handler support
   for UTF-8 and more support for Unicode character sets in the
-  I/O-system.</p>
-
-  <p>In Erlang/OTP 17.0, the encoding default for Erlang source files was
-  switched to UTF-8 and in Erlang/OTP 18.0 Erlang will support atoms in the full
-  Unicode range, meaning full Unicode function and module
-  names</p>
+  I/O-system. In Erlang/OTP 17.0, the encoding default for Erlang source files was
+  switched to UTF-8.</p>
 
   <p>This guide outlines the current Unicode support and gives a couple
   of recipes for working with Unicode data.</p>
@@ -289,8 +285,8 @@
     <tag>The language</tag>
     <item>Having the source code in UTF-8 also allows you to write
     string literals containing Unicode characters with code points &gt;
-    255, although atoms, module names and function names will be
-    restricted to the ISO-Latin-1 range until the Erlang/OTP 18.0 release. Binary
+    255, although atoms, module names and function names are
+    restricted to the ISO-Latin-1 range. Binary
     literals where you use the <c>/utf8</c> type, can also be
     expressed using Unicode characters &gt; 255. Having module names
     using characters other than 7-bit ASCII can cause trouble on
@@ -385,8 +381,7 @@ external_charlist() = maybe_improper_list(char() |
   using characters from the ISO-latin-1 character set and atoms are
   restricted to the same ISO-latin-1 range. These restrictions in the
   language are of course independent of the encoding of the source
-  file. Erlang/OTP 18.0 is expected to handle functions named in
-  Unicode as well as Unicode atoms.</p>
+  file.</p>
   <section>
     <title>Bit-syntax</title>
     <p>The bit-syntax contains types for coping with binary data in the
diff --git a/system/doc/reference_manual/character_set.xml b/system/doc/reference_manual/character_set.xml
index 884898eb34..b09b484582 100644
--- a/system/doc/reference_manual/character_set.xml
+++ b/system/doc/reference_manual/character_set.xml
@@ -101,9 +101,10 @@
       <tcaption>Character Classes.</tcaption>
     </table>
     <p>In Erlang/OTP R16B the syntax of Erlang tokens was extended to
-       handle Unicode. To begin with the support is limited to
-       strings, but Erlang/OTP 18 is expected to handle Unicode atoms
-       as well. More about the usage of Unicode in Erlang source files
+       handle Unicode. The support is limited to
+       string literals and comments. Atoms, module names, and
+       function names are restricted to the ISO-Latin-1 range.
+       More about the usage of Unicode in Erlang source files
        can be found in <seealso
        marker="stdlib:unicode_usage#unicode_in_erlang">STDLIB's User's
        Guide</seealso>.</p>