commit: cleanup

FormulaEnginePoC/FormulaEngine/Internal/FormulaConverter.cs

@@ -103,18 +103,4 @@ namespace FormulaEnginePoC.FormulaEngine.Internal
             return code.ToString();
         }
     }
-
-    internal static class StringUtils
-    {
-        public static string FullWidthToHalfWith(string fullWidth)
-        {
-            var c = fullWidth.ToCharArray();
-            for (var i = 0; i < c.Length; i++)
-            {
-                if (c[i] > 65280 && c[i] < 65375)
-                    c[i] = (char)(c[i] - 65248);
-            }
-            return new string(c);
-        }
-    }
 }