Clean up unused code

Author: eerhardt

src/Cli/Microsoft.DotNet.Cli.Utils/RuntimeEnvironment.cs

@@ -25,92 +25,6 @@ internal static class RuntimeEnvironment
         public static string OperatingSystemVersion { get; } = GetOSVersion();
         public static string OperatingSystem { get; } = GetOSName();
 
-        // toolset-tasks.csproj needs to build for full .NET Framework, and needs to get the current
-        // RuntimeIdentifier of the machine. Because of this, it needs to implement
-        // it's own GetRuntimeIdentifier(). All other places should use RuntimeInformation.RuntimeIdentifier.
-#if TOOLSET_TASKS
-        private static readonly string OverrideEnvironmentVariableName = "DOTNET_RUNTIME_ID";
-
-        public static string GetRuntimeIdentifier()
-        {
-            return
-                Environment.GetEnvironmentVariable(OverrideEnvironmentVariableName) ??
-                (GetRIDOS() + GetRIDVersion() + GetRIDArch());
-        }
-
-        private static string GetRIDArch()
-        {
-            return $"-{RuntimeInformation.ProcessArchitecture.ToString().ToLowerInvariant()}";
-        }
-
-        private static string GetRIDVersion()
-        {
-            // Windows RIDs do not separate OS name and version by "." due to legacy
-            // Others do, that's why we have the "." prefix on them below
-            switch (OperatingSystemPlatform)
-            {
-                case Platform.Windows:
-                    return GetWindowsProductVersion();
-                case Platform.Linux:
-                    if (string.IsNullOrEmpty(OperatingSystemVersion))
-                    {
-                        return string.Empty;
-                    }
-
-                    return $".{OperatingSystemVersion}";
-                case Platform.Darwin:
-                    return $".{OperatingSystemVersion}";
-                case Platform.FreeBSD:
-                    return $".{OperatingSystemVersion}";
-                default:
-                    return string.Empty; // Unknown Platform? Unknown Version!
-            }
-        }
-
-        private static string GetWindowsProductVersion()
-        {
-            var ver = Version.Parse(OperatingSystemVersion);
-            if (ver.Major == 6)
-            {
-                if (ver.Minor == 1)
-                {
-                    return "7";
-                }
-                else if (ver.Minor == 2)
-                {
-                    return "8";
-                }
-                else if (ver.Minor == 3)
-                {
-                    return "81";
-                }
-            }
-            else if (ver.Major >= 10)
-            {
-                // Return the major version for use in RID computation without applying any cap.
-                return ver.Major.ToString();
-            }
-            return string.Empty; // Unknown version
-        }
-
-        private static string GetRIDOS()
-        {
-            switch (OperatingSystemPlatform)
-            {
-                case Platform.Windows:
-                    return "win";
-                case Platform.Linux:
-                    return OperatingSystem.ToLowerInvariant();
-                case Platform.Darwin:
-                    return "osx";
-                case Platform.FreeBSD:
-                    return "freebsd";
-                default:
-                    return "unknown";
-            }
-        }
-#endif // TOOLSET_TASKS
-
         private class DistroInfo
         {
             public string Id;
@@ -372,6 +286,5 @@ internal static string RtlGetVersion()
                 }
             }
         }
-
     }
 }

src/Layout/redist/targets/GetRuntimeInformation.targets

@@ -2,18 +2,15 @@
   <Target Name="GetCurrentRuntimeInformation"
           DependsOnTargets="GetCoreSdkGitCommitInfo"
           BeforeTargets="Build">
-    <GetCurrentRuntimeInformation>
-      <Output TaskParameter="Rid" PropertyName="HostRid" />
-      <Output TaskParameter="OSName" PropertyName="HostOSName" />
-    </GetCurrentRuntimeInformation>
 
     <PropertyGroup>
-      <IsLinux Condition = " '$(HostOSName)' != 'win' AND '$(HostOSName)' != 'osx' ">True</IsLinux>
-      <OSName Condition=" '$(OSName)' == '' AND '$(IsLinux)' != 'True' ">$(HostOSName)</OSName>
-      <OSName Condition=" '$(OSName)' == '' AND '$(IsLinux)' == 'True' ">linux</OSName>
+      <OSName Condition=" '$(OSName)' == '' AND $([MSBuild]::IsOSPlatform('WINDOWS')) ">win</OSName>
+      <OSName Condition=" '$(OSName)' == '' AND $([MSBuild]::IsOSPlatform('OSX')) ">osx</OSName>
+      <OSName Condition=" '$(OSName)' == '' ">linux</OSName>
 
       <Architecture Condition=" '$(Architecture)' == '' ">x64</Architecture>
       <Rid Condition=" '$(Rid)' == '' ">$(OSName)-$(Architecture)</Rid>
     </PropertyGroup>
+
   </Target>
 </Project>

src/Layout/toolset-tasks/CurrentPlatform.cs

@@ -6,10 +6,6 @@
     <DefineConstants>$(DefineConstants);TOOLSET_TASKS</DefineConstants>
   </PropertyGroup>
 
-  <ItemGroup>
-    <Compile Include="..\..\Cli\Microsoft.DotNet.Cli.Utils\RuntimeEnvironment.cs" />
-  </ItemGroup>
-
   <ItemGroup>
     <PackageReference Include="Microsoft.Build" Version="15.7.179" />
     <PackageReference Include="Microsoft.Build.Utilities.Core" Version="15.7.179" />