[gtksourceview] docs: porting guide: remove recommendation to build 3.99.x tarballs

[Sébastien Wilmet <swilmet src gnome org>]

commit 82eab68485b05afb1259229ed882fbc8a7b29424
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Thu Dec 14 13:12:29 2017 +0100

    docs: porting guide: remove recommendation to build 3.99.x tarballs
    
    It was initially planned for GtkSourceView 4 to rename the namespace
    from GtkSource to Gsv. But this won't happen: error, not enough funding.
    
    With the namespace change it would have made sense to build intermediate
    tarballs, to handle the small GtkSource API breaks first, and then
    handling the GtkSource -> Gsv namespace change with a separate commit.
    But handling all the GtkSource API breaks at once is entirely feasible,
    since it's mostly renaming functions version 2 back to the original
    names.
    
    In the porting guide, keep sub-sections for each 3.99.x version, it
    doesn't hurt to keep that information.

 docs/reference/porting-guide-3-to-4.xml |   10 ----------
 1 files changed, 0 insertions(+), 10 deletions(-)
---
diff --git a/docs/reference/porting-guide-3-to-4.xml b/docs/reference/porting-guide-3-to-4.xml
index a312caf..b540b58 100644
--- a/docs/reference/porting-guide-3-to-4.xml
+++ b/docs/reference/porting-guide-3-to-4.xml
@@ -42,16 +42,6 @@
   </refsect1>
 
   <refsect1>
-    <title>A set of intermediate tarballs to ease the transition</title>
-    <para>
-      When porting to GtkSourceView 4, instead of doing everything in one step,
-      you can compile intermediate 3.99.x tarballs of GtkSourceView, so that you
-      can compile your code regularly and run the tests. Not doing all at once
-      in one big commit, but instead doing smaller and testable commits.
-    </para>
-  </refsect1>
-
-  <refsect1>
     <title>GtkSourceView 3.99.1</title>
     <itemizedlist>
       <listitem>