Remove more unused code

Author: CharliePoole

src/NUnitEngine/nunit.engine/Services/RuntimeLocators/NetCoreRuntimeLocator.cs

@@ -13,16 +13,6 @@ public static IEnumerable<RuntimeFramework> FindRuntimes(bool x86)
         {
             List<Version> alreadyFound = new List<Version>();
 
-            //foreach (string dirName in GetRuntimeDirectories(x86))
-            //{
-            //    Version newVersion;
-            //    if (TryGetVersionFromString(dirName, out newVersion) && !alreadyFound.Contains(newVersion))
-            //    {
-            //        alreadyFound.Add(newVersion);
-            //        yield return new RuntimeFramework(RuntimeType.NetCore, newVersion);
-            //    }
-            //}
-
             foreach (var runtime in DotNet.GetRuntimes("Microsoft.NETCore.App"))
             {
                 if (!alreadyFound.Contains(runtime.Version))
@@ -32,46 +22,6 @@ public static IEnumerable<RuntimeFramework> FindRuntimes(bool x86)
                 }
             }
         }
-
-        private static IEnumerable<string> GetRuntimeDirectories(bool x86)
-        {
-            string installDir = DotNet.GetInstallDirectory(x86);
-
-            if (installDir != null && Directory.Exists(installDir) &&
-                File.Exists(Path.Combine(installDir, "dotnet.exe")))
-            {
-                string runtimeDir = Path.Combine(installDir, Path.Combine("shared", "Microsoft.NETCore.App"));
-                if (Directory.Exists(runtimeDir))
-                    foreach (var dir in new DirectoryInfo(runtimeDir).GetDirectories())
-                        yield return dir.Name;
-            }
-        }
-
-        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
-            {
-                var fullVersion = new Version(text.Substring(0, len));
-                newVersion = new Version(fullVersion.Major, fullVersion.Minor);
-                return true;
-            }
-            catch
-            {
-                newVersion = new Version();
-                return false;
-            }
-        }
     }
 }
 #endif