[gnome-documents] view: remove duplicated code

[Cosimo Cecchi <cosimoc src gnome org>]

commit 7635f8713deb3d61fc4ed462017ec97d27c30150
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Mon Sep 19 14:43:07 2016 -0700

    view: remove duplicated code
    
    This is already called before this function is invoked.

 src/view.js |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)
---
diff --git a/src/view.js b/src/view.js
index fbea78c..f60c645 100644
--- a/src/view.js
+++ b/src/view.js
@@ -780,8 +780,6 @@ const View = new Lang.Class({
     },
 
     _createPreview: function(mode) {
-        this._clearPreview();
-
         let constructor;
         switch (mode) {
         case WindowMode.WindowMode.PREVIEW_EV: