Delete some dead code

src/libraries/System.Runtime.Extensions/tests/System.Runtime.Extensions.Tests.csproj

@@ -76,7 +76,7 @@
     <Compile Include="System\Runtime\ProfileOptimization.cs" />
     <Compile Include="System\Runtime\CompilerServices\SwitchExpressionExceptionTests.cs" />
 
-    <Compile Include="$(CommonPath)Interop\Unix\System.Native\Interop.GetNodeName.cs" Condition="'$(TargetsUnix)' == 'true' or '$(TargetsBrowser)' == 'true'" Link="Common\Interop\Unix\System.Native\Interop.GetNodeName.cs" />
+    <Compile Include="$(CommonPath)Interop\Unix\System.Native\Interop.GetHostName.cs" Condition="'$(TargetsUnix)' == 'true' or '$(TargetsBrowser)' == 'true'" Link="Common\Interop\Unix\System.Native\Interop.GetHostName.cs" />
     <Compile Include="$(CommonPath)Interop\Unix\Interop.Libraries.cs" Link="Common\Interop\Unix\Interop.Libraries.cs" />
     <Compile Include="$(CommonTestPath)System\IO\PathFeatures.cs" Link="Common\System\IO\PathFeatures.cs" />
     <Compile Include="$(CommonTestPath)System\ShouldNotBeInvokedException.cs" Link="Common\System\ShouldNotBeInvokedException.cs" />

src/libraries/System.Runtime.Extensions/tests/System/Environment.MachineName.cs

@@ -18,13 +18,13 @@ public void TestMachineNameProperty()
         internal static string GetComputerName()
         {
 #if !Unix
-                return Environment.GetEnvironmentVariable("COMPUTERNAME");
+            return Environment.GetEnvironmentVariable("COMPUTERNAME");
 #else
-                if (PlatformDetection.IsBrowser)
-                    return "localhost";
-                string temp = Interop.Sys.GetNodeName();
-                int index = temp.IndexOf('.');
-                return index < 0 ? temp : temp.Substring(0, index);
+            if (PlatformDetection.IsBrowser)
+                return "localhost";
+            string temp = Interop.Sys.GetHostName();
+            int index = temp.IndexOf('.');
+            return index < 0 ? temp : temp.Substring(0, index);
 #endif
         }
     }

src/mono/System.Private.CoreLib/src/System/TypeSpec.cs

@@ -305,27 +305,6 @@ internal static string UnescapeInternalName(string displayName)
             return res.ToString();
         }
 
-        internal static bool NeedsEscaping(string internalName)
-        {
-            foreach (char c in internalName)
-            {
-                switch (c)
-                {
-                    case ',':
-                    case '+':
-                    case '*':
-                    case '&':
-                    case '[':
-                    case ']':
-                    case '\\':
-                        return true;
-                    default:
-                        break;
-                }
-            }
-            return false;
-        }
-
         internal Type? Resolve(Func<AssemblyName, Assembly> assemblyResolver, Func<Assembly, string, bool, Type> typeResolver, bool throwOnError, bool ignoreCase, ref StackCrawlMark stackMark)
         {
             Assembly? asm = null;

src/native/libs/System.Native/CMakeLists.txt

@@ -27,7 +27,6 @@ set(NATIVE_SOURCES
     pal_process.c
     pal_random.c
     pal_runtimeinformation.c
-    pal_runtimeextensions.c
     pal_signal.c
     pal_string.c
     pal_tcpstate.c

src/native/libs/System.Native/entrypoints.c

@@ -21,7 +21,6 @@
 #include "pal_networkstatistics.h"
 #include "pal_process.h"
 #include "pal_random.h"
-#include "pal_runtimeextensions.h"
 #include "pal_runtimeinformation.h"
 #include "pal_searchpath.h"
 #include "pal_signal.h"
@@ -214,7 +213,6 @@ static const Entry s_sysNative[] =
     DllImportEntry(SystemNative_GetProcessPath)
     DllImportEntry(SystemNative_GetNonCryptographicallySecureRandomBytes)
     DllImportEntry(SystemNative_GetCryptographicallySecureRandomBytes)
-    DllImportEntry(SystemNative_GetNodeName)
     DllImportEntry(SystemNative_GetUnixName)
     DllImportEntry(SystemNative_GetUnixRelease)
     DllImportEntry(SystemNative_GetUnixVersion)