Remove unused methods

Author: CharliePoole

src/NUnitEngine/nunit.engine.core/Internal/TestAssemblyResolver.cs

@@ -255,55 +255,6 @@ public AspNetCoreStrategy() : base("Microsoft.AspNetCore.App") { }
         }
 
         #endregion
-
-        #region HelperMethods
-
-        private static string FindBestVersionDir(string libraryDir, Version targetVersion)
-        {
-            string target = targetVersion.ToString();
-            Version bestVersion = new Version(0, 0);
-            foreach (var subdir in Directory.GetDirectories(libraryDir))
-            {
-                Version version;
-                if (TryGetVersionFromString(Path.GetFileName(subdir), out version))
-                {
-                    if (version >= targetVersion)
-                        if (bestVersion.Major == 0 || bestVersion > version)
-                            bestVersion = version;
-                }
-            }
-
-            return bestVersion.Major > 0
-                ? bestVersion.ToString()
-                : null;
-        }
-
-        private static bool TryGetVersionFromString(string text, out Version newVersion)
-        {
-            const string VERSION_CHARS = ".0123456789";
-
-            int len = 0;
-            foreach (char c in text)
-            {
-                if (VERSION_CHARS.IndexOf(c) >= 0)
-                    len++;
-                else
-                    break;
-            }
-
-            try
-            {
-                newVersion = new Version(text.Substring(0, len));
-                return true;
-            }
-            catch
-            {
-                newVersion = new Version();
-                return false;
-            }
-        }
-
-        #endregion
     }
 }
 #endif