[gedit] docs: document that all deprecated APIs have been removed

[Sébastien Wilmet <swilmet src gnome org>]

commit bb4ba55435121afb68aa255658dc007782dc0c04
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Wed Nov 11 18:51:56 2020 +0100

    docs: document that all deprecated APIs have been removed

 docs/reference/api-breaks.xml | 5 +++++
 1 file changed, 5 insertions(+)
---
diff --git a/docs/reference/api-breaks.xml b/docs/reference/api-breaks.xml
index 699ba9e7e..b8dba4f79 100644
--- a/docs/reference/api-breaks.xml
+++ b/docs/reference/api-breaks.xml
@@ -24,6 +24,11 @@
   <refsect1>
     <title>3.38 -> 40</title>
     <itemizedlist>
+      <listitem>
+        <para>
+          All previously deprecated APIs have been removed.
+        </para>
+      </listitem>
       <listitem>
         <para>
           The <code>GeditProgressInfoBar</code> class has been removed, you can