[gnote] Remove unused include

[Aurimas Černius <aurimasc src gnome org>]

commit d979f744b5e38e5bb04a60836e4040b33125e3b2
Author: Aurimas Černius <aurisc4 gmail com>
Date:   Sun Apr 28 19:28:06 2019 +0300

    Remove unused include

 src/notebooks/notebookstreeview.cpp | 2 --
 1 file changed, 2 deletions(-)
---
diff --git a/src/notebooks/notebookstreeview.cpp b/src/notebooks/notebookstreeview.cpp
index 92227d97..f4751c71 100644
--- a/src/notebooks/notebookstreeview.cpp
+++ b/src/notebooks/notebookstreeview.cpp
@@ -20,8 +20,6 @@
 
 
 
-#include <list>
-
 #include <gtkmm/targetentry.h>
 
 #include "debug.hpp"