Add missing features to copyconstructor, remove dead code feature

src/libraries/Microsoft.PowerFx.Core/Public/Config/Features.cs

@@ -71,11 +71,6 @@ public sealed class Features
         /// </summary>
         internal bool AsTypeLegacyCheck { get; init; }
 
-        /// <summary>
-        /// This is required by AsType() in Legacy Analysis.
-        /// </summary>
-        internal bool IsLegacyAnalysis { get; init; }
-
         /// <summary>
         /// Removes support for coercing a control to it's primary output property. 
         /// This only impacts PA Client scenarios, but some code still lives in PFx. 
@@ -131,6 +126,11 @@ internal Features(Features other)
             PowerFxV1CompatibilityRules = other.PowerFxV1CompatibilityRules;
             PrimaryOutputPropertyCoercionDeprecated = other.PrimaryOutputPropertyCoercionDeprecated;
             IsUserDefinedTypesEnabled = other.IsUserDefinedTypesEnabled;
+            AllowImpureNodeDelegation = other.AllowImpureNodeDelegation;
+            AllowAsyncDelegation = other.AllowAsyncDelegation;
+            AsTypeLegacyCheck = other.AsTypeLegacyCheck;
+            JsonFunctionAcceptsLazyTypes = other.JsonFunctionAcceptsLazyTypes;
+            IsLookUpReductionDelegationEnabled = other.IsLookUpReductionDelegationEnabled;
         }
     }
 }