[gnome-usage] speedometer: Remove old_angle now unused

[Felipe Borges <felipeborges src gnome org>]

commit 1af7b638d190ca47adac25e3f6a0ecfbf490960e
Author: makepost <makepost firemail cc>
Date:   Sat Nov 25 21:53:25 2017 +0200

    speedometer: Remove old_angle now unused

 src/speedometer.vala | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)
---
diff --git a/src/speedometer.vala b/src/speedometer.vala
index 9c239a9..9d3b3f6 100644
--- a/src/speedometer.vala
+++ b/src/speedometer.vala
@@ -39,7 +39,7 @@ namespace Usage
                 return _percentage;
             }
             set {
-                on_percentage_changed(_percentage, value);
+                on_percentage_changed(value);
 
                 _percentage = value;
             }
@@ -54,20 +54,16 @@ namespace Usage
             bind_property("height-request", content_area, "height-request", BindingFlags.BIDIRECTIONAL);
         }
 
-        private void on_percentage_changed(int old_value, int new_value)
+        private void on_percentage_changed(int new_value)
         {
             if (new_value <= 0 && new_value >= 100)
                 return;
 
-            double old_angle, new_angle;
-
-            old_angle = 90 + (360 * (old_value/100.0));
-            new_angle = 90 + (360 * (new_value/100.0));
+            double new_angle = 90 + (360 * (new_value/100.0));
             var filling_color = "@theme_base_color";
 
             if (new_value > 50)
             {
-                old_angle -= 180;
                 new_angle -= 180;
                 filling_color = "@theme_selected_bg_color";
             }