revert: remove degree symbol fix (moved to caller)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

EtchBendLines/Etcher.cs

@@ -86,22 +86,9 @@ namespace EtchBendLines
             {
                 writer.Write();
             }
-
-            FixDegreeSymbol(path);
-
             Console.WriteLine($"→ Saved with etch lines: {path}");
         }
 
-        private static void FixDegreeSymbol(string path)
-        {
-            var text = File.ReadAllText(path);
-            if (text.Contains("\u00C2\u00B0"))
-            {
-                text = text.Replace("\u00C2\u00B0", "\u00B0");
-                File.WriteAllText(path, text);
-            }
-        }
-
         private static string KeyFor(Line l) => KeyFor(l.StartPoint, l.EndPoint);
 
         private static string KeyFor(XYZ a, XYZ b) => $"{a.X:F3},{a.Y:F3}|{b.X:F3},{b.Y:F3}";