[pitivi] docs: Remove useless obsolete info

[Alexandru Băluț <alexbalut src gnome org>]

commit 93b1d4ef157dee6cbc32c2fd174868b5a013f1b6
Author: Alexandru Băluț <alexandru balut gmail com>
Date:   Sun Feb 11 03:06:12 2018 +0100

    docs: Remove useless obsolete info
    
    Fixes https://phabricator.freedesktop.org/T3256
    
    Differential Revision: https://phabricator.freedesktop.org/D1923

 docs/Troubleshooting.md               |   99 -----------
 docs/attic/Dependencies.md            |  173 -------------------
 docs/attic/GStreamer_from_Git.md      |  299 ---------------------------------
 docs/attic/GStreamer_using_jhbuild.md |  218 ------------------------
 docs/attic/Performance_problems.md    |    4 -
 docs/releases/PiTiVi_on_Windows.md    |  164 ------------------
 docs/sitemap.txt                      |    2 -
 7 files changed, 0 insertions(+), 959 deletions(-)
---
diff --git a/docs/sitemap.txt b/docs/sitemap.txt
index 372ce39..bf8c8da 100644
--- a/docs/sitemap.txt
+++ b/docs/sitemap.txt
@@ -51,7 +51,6 @@ index.md
        Testing.md
                QA_Scenarios.md
                Test_suite_wishlist.md
-       Troubleshooting.md
        design.md
                design/Why_python.md
                design/Proxy_editing_requirements.md
@@ -86,4 +85,3 @@ index.md
        attic.md
                attic/GNonLin.md
                attic/Building_with_Windows.md
-               attic/Dependencies.md