Remove Platform.HasGroupPolicySupport query

src/System.Management.Automation/CoreCLR/CorePsPlatform.cs

@@ -217,12 +217,6 @@ namespace System.Management.Automation
 
         }
 
-        // Linux does not have group policy support
-        internal static bool HasGroupPolicySupport()
-        {
-            return IsWindows;
-        }
-
         // non-windows does not have network drive support
         internal static bool HasNetworkDriveSupport()
         {

src/System.Management.Automation/engine/Utils.cs

@@ -649,13 +649,9 @@ namespace System.Management.Automation
 
         internal static Dictionary<string, object> GetGroupPolicySetting(string groupPolicyBase, string settingName, RegistryKey[] preferenceOrder)
         {
-            if (!Platform.HasGroupPolicySupport())
-            {
-                // Porting note: No group policy support means we have an empty set of
-                // policies.
-                return _emptyDictionary;
-            }
-
+#if LINUX
+            return _emptyDictionary;
+#else
             lock (cachedGroupPolicySettings)
             {
                 // Return cached information, if we have it
@@ -730,6 +726,7 @@ namespace System.Management.Automation
 
                 return settings;
             }
+#endif
         }
         static ConcurrentDictionary<string, Dictionary<string, object>> cachedGroupPolicySettings =
             new ConcurrentDictionary<string, Dictionary<string, object>>();