replace deprecated feature warnings with entity reference

Author: jordikroon

appendices/ini.core.xml

@@ -254,11 +254,7 @@
          sufficient security measure for shared hosting environments.
         </simpara>
        </warning>
-       <warning>
-        <simpara>
-         This directive has been <emphasis>REMOVED</emphasis> as of PHP 8.5.0.
-        </simpara>
-       </warning>
+       &warn.removed.feature-8-5-0;
       </listitem>
      </varlistentry>
 

language-snippets.ent

@@ -462,6 +462,10 @@ xmlns="http://docbook.org/ns/docbook"><simpara>This function was
 <!ENTITY warn.removed.alias-8-0-0 '<warning xmlns="http://docbook.org/ns/docbook"><simpara>This alias is
 <emphasis>REMOVED</emphasis> as of PHP 8.0.0.</simpara></warning>'>
 
+<!ENTITY warn.removed.feature-8-5-0 '<warning
+xmlns="http://docbook.org/ns/docbook"><simpara>This feature has been
+<emphasis>REMOVED</emphasis> as of PHP 8.5.0.</simpara></warning>'>
+
 <!ENTITY warn.experimental.func '<warning xmlns="http://docbook.org/ns/docbook"><simpara>This function is
 <emphasis>EXPERIMENTAL</emphasis>. The behaviour of this function, its name, and
 surrounding documentation may change without notice in a future release of PHP.