Remove timestamp from follow requests because it is the timestamp of account creation

lib/controls/notifications_control.dart

@@ -142,12 +142,14 @@ class NotificationControl extends StatelessWidget {
           onTapUrl: (_) async => onTap!(),
         ),
       ),
-      subtitle: GestureDetector(
-        onTap: onTap,
-        child: Text(
-          ElapsedDateUtils.epochSecondsToString(notification.timestamp),
-        ),
-      ),
+      subtitle: notification.type == NotificationType.follow_request
+          ? null
+          : GestureDetector(
+              onTap: onTap,
+              child: Text(
+                ElapsedDateUtils.epochSecondsToString(notification.timestamp),
+              ),
+            ),
       trailing: notification.dismissed ||
               notification.type == NotificationType.direct_message
           ? null