Remove redundant benchmark method

Author: jcansdale

test/GitHub.InlineReviews.UnitTests/Models/DiffUtilitiesTests.cs

@@ -366,23 +366,6 @@ public void CountCarriageReturns_NullText_ArgumentNullException()
             {
                 Assert.Throws<ArgumentNullException>(() => DiffUtilities.LineReader.CountCarriageReturns(null));
             }
-
-            static void Benchmark_ReadLineAndCountCarriageReturns_100000()
-            {
-
-                var file = new System.Diagnostics.StackFrame(true).GetFileName();
-                var text = File.ReadAllText(file);
-
-                for (int count = 0; count < 100000; count++)
-                {
-                    var lineReader = new DiffUtilities.LineReader(text);
-                    string line;
-                    while ((line = lineReader.ReadLine()) != null)
-                    {
-                        DiffUtilities.LineReader.CountCarriageReturns(line);
-                    }
-                }
-            }
         }
     }
 }