[tracker] util/sandbox: Avoid misleading error message

[Sam Thursfield <sthursfield src gnome org>]

commit 38c2a4e226c6e71d924386b2c295a861d992359f
Author: Sam Thursfield <sam afuera me uk>
Date:   Fri Aug 2 12:58:34 2019 +0200

    util/sandbox: Avoid misleading error message
    
    This error message no longer shows during normal operation:
    
        Unexpected error: No such file or directory /home/sam/tracker-temp/run/dbus-session

 utils/sandbox/tracker-sandbox.py | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)
---
diff --git a/utils/sandbox/tracker-sandbox.py b/utils/sandbox/tracker-sandbox.py
index b3b9280fb..06bc6afb0 100755
--- a/utils/sandbox/tracker-sandbox.py
+++ b/utils/sandbox/tracker-sandbox.py
@@ -276,9 +276,7 @@ def dbus_session_file_get():
         with open(dbus_session_file, 'r') as f:
             content = f.read()
             return dbus_session_get_from_content(content)
-    except (IOError, OSError) as e:
-        print("Unexpected error: %s %s" % (e.strerror, e.filename),
-              file=sys.stderr)
+    except FileNotFoundError as e:
         # Expect this if we have a new session to set up
         return False