diff --git a/src/libse/Common/TextLengthCalculator/TextLengthHelper.cs b/src/libse/Common/TextLengthCalculator/TextLengthHelper.cs
deleted file mode 100644
index 9afe911ba..000000000
--- a/src/libse/Common/TextLengthCalculator/TextLengthHelper.cs
+++ /dev/null
@@ -1,30 +0,0 @@
-using System;
-
-namespace Nikse.SubtitleEdit.Core.Common.TextLengthCalculator
-{
-    public static class TextLengthHelper
-    {
-        public static decimal CountCharacters(string text, bool forCps)
-        {
-            return CalcFactory.MakeCalculator(Configuration.Settings.General.CpsLineLengthStrategy).CountCharacters(text, forCps);
-        }
-
-        public static bool IsKnownHtmlTag(string input, int index)
-        {
-            var s = input.Remove(0, index + 1).ToLowerInvariant();
-            return s.StartsWith('/') ||
-                   s.StartsWith("i>", StringComparison.Ordinal) ||
-                   s.StartsWith("b>", StringComparison.Ordinal) ||
-                   s.StartsWith("u>", StringComparison.Ordinal) ||
-                   s.StartsWith("font ", StringComparison.Ordinal) ||
-                   s.StartsWith("ruby", StringComparison.Ordinal) ||
-                   s.StartsWith("span>", StringComparison.Ordinal) ||
-                   s.StartsWith("span ", StringComparison.Ordinal) ||
-                   s.StartsWith("p>", StringComparison.Ordinal) ||
-                   s.StartsWith("br>", StringComparison.Ordinal) ||
-                   s.StartsWith("box>", StringComparison.Ordinal) ||
-                   s.StartsWith("div>", StringComparison.Ordinal) ||
-                   s.StartsWith("div ", StringComparison.Ordinal);
-        }
-    }
-}
\ No newline at end of file