[pitivi] docs: Remove non-design obsolete page

[Thibault Saunier <tsaunier src gnome org>]

commit 355e083061eaa97d21ec935f3a0b2130d9734267
Author: Alexandru Băluț <alexandru balut gmail com>
Date:   Wed Sep 12 03:01:33 2018 +0200

    docs: Remove non-design obsolete page

 docs/design/Rendering_Profiles.md                |  3 -
 docs/design/Rendering_Profiles_Implementation.md | 95 ------------------------
 docs/sitemap.txt                                 |  1 -
 3 files changed, 99 deletions(-)
---
diff --git a/docs/design/Rendering_Profiles.md b/docs/design/Rendering_Profiles.md
index 787c8212..b689eb99 100644
--- a/docs/design/Rendering_Profiles.md
+++ b/docs/design/Rendering_Profiles.md
@@ -7,9 +7,6 @@ intended publishing medium. If the user doesn't fit in those presets, he
 probably knows what he is doing/what he wants and will use the
 “Custom...” approach, or perhaps make his own preset for later reuse.
 
-See also: [Rendering Profiles
-Implementation](design/Rendering_Profiles_Implementation.md)
-
 -   Tapes and disks / (“publishing”?)
     -   DVD
         -   NTSC, PAL, etc.
diff --git a/docs/sitemap.txt b/docs/sitemap.txt
index f7cdef9b..e18eee23 100644
--- a/docs/sitemap.txt
+++ b/docs/sitemap.txt
@@ -55,7 +55,6 @@ index.md
                design/Proxy_editing_requirements.md
                design/Rendering_Profiles.md
                design/XGES_Examples.md
-               design/Rendering_Profiles_Implementation.md
                design/Plugins.md
                design/2007_design/2007_Advanced_UI_Mockups.md
                design/2007_design/2007_Advanced_UI_implementation.md