[gnome-documents] preview-menu: remove unused ID

[Cosimo Cecchi <cosimoc src gnome org>]

commit 13f254b5b6a55c2f7606bd6d98fe7ff7b18ab302
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Mon Sep 19 14:42:31 2016 -0700

    preview-menu: remove unused ID
    
    We don't do anything special with this section anymore.

 data/ui/preview-menu.ui |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/data/ui/preview-menu.ui b/data/ui/preview-menu.ui
index b2e7190..d3c35c0 100644
--- a/data/ui/preview-menu.ui
+++ b/data/ui/preview-menu.ui
@@ -37,7 +37,7 @@
         <attribute name="accel">&lt;Primary&gt;minus</attribute>
       </item>
     </section>
-    <section id='rotate-section'>
+    <section>
       <item>
         <attribute name="action">view.rotate-left</attribute>
         <attribute name='hidden-when'>action-missing</attribute>