[gnome-calculator] Removed past author email addresses (fixes #174)

[Robert Roth <robertroth src gnome org>]

commit 5df7d41e2eb531cb885d0effdc2e201dc8ad1775
Author: Robert Roth <robert roth off gmail com>
Date:   Sat Jul 18 19:15:18 2020 +0300

    Removed past author email addresses (fixes #174)

 src/gnome-calculator.vala | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/src/gnome-calculator.vala b/src/gnome-calculator.vala
index 08446a0f..c72b8dbd 100644
--- a/src/gnome-calculator.vala
+++ b/src/gnome-calculator.vala
@@ -313,11 +313,11 @@ public class Calculator : Gtk.Application
     {
         string[] authors =
         {
-            "Rich Burridge <rich burridge gmail com>",
-            "Robert Ancell <robert ancell gmail com>",
-            "Klaus Niederkrüger <kniederk umpa ens-lyon fr>",
-            "Robin Sonefors <ozamosi flukkost nu>",
             "Robert Roth <robert roth off gmail com>",
+            "Robert Ancell",
+            "Klaus Niederkrüger",
+            "Robin Sonefors",
+            "Rich Burridge",
             null
         };
         string[] documenters =