[sushi] evince: fix leftover code snippet

[Cosimo Cecchi <cosimoc src gnome org>]

commit 19cd6f67ed2b9f9cf073cd72566b9fdbb58f9c03
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Wed Jun 19 10:57:55 2019 -0700

    evince: fix leftover code snippet
    
    _onDestroy() was removed in a previous commit.

 src/viewers/evince.js | 1 -
 1 file changed, 1 deletion(-)
---
diff --git a/src/viewers/evince.js b/src/viewers/evince.js
index e40ea7a..aadf8eb 100644
--- a/src/viewers/evince.js
+++ b/src/viewers/evince.js
@@ -67,7 +67,6 @@ var Klass = GObject.registerClass({
         this._view.show();
         this.add(this._view);
 
-        this.connect('destroy', this._onDestroy.bind(this));
         this.isReady();
     }