Remove ViewModelTypeName from ReactiveObjectInfo

Eliminated the ViewModelTypeName property from the ReactiveObjectInfo record and updated the generator logic to reflect this change. This simplifies the model and generator by removing unused or unnecessary data.

Author: ChrisPulman

src/ReactiveUI.SourceGenerators.Roslyn/ReactiveObject/Models/ReactiveObjectInfo.cs

@@ -9,5 +9,4 @@ namespace ReactiveUI.SourceGenerators.Models;
 /// A model with gathered info on a given command method.
 /// </summary>
 internal sealed record ReactiveObjectInfo(
-    TargetInfo TargetInfo,
-    string ViewModelTypeName);
+    TargetInfo TargetInfo);

src/ReactiveUI.SourceGenerators.Roslyn/ReactiveObject/ReactiveObjectGenerator.Execute.cs

@@ -32,35 +32,18 @@ public partial class ReactiveObjectGenerator
         var symbol = context.TargetSymbol;
         token.ThrowIfCancellationRequested();
 
-        if (!symbol.TryGetAttributeWithFullyQualifiedMetadataName(AttributeDefinitions.ReactiveObjectAttributeType, out var attributeData))
-        {
-            return default;
-        }
-
-        token.ThrowIfCancellationRequested();
         if (symbol is not INamedTypeSymbol classSymbol)
         {
             return default;
         }
 
-        var constructorArgument = attributeData.GetConstructorArguments<string>().FirstOrDefault();
-        var genericArgument = attributeData.GetGenericType();
-        token.ThrowIfCancellationRequested();
-        var viewModelTypeName = string.IsNullOrWhiteSpace(constructorArgument) ? genericArgument : constructorArgument;
-        if (string.IsNullOrWhiteSpace(viewModelTypeName))
-        {
-            return default;
-        }
-
         token.ThrowIfCancellationRequested();
 
         // Get the containing type info
         var targetInfo = TargetInfo.From(classSymbol);
 
         token.ThrowIfCancellationRequested();
-        return new(
-            targetInfo,
-            viewModelTypeName!);
+        return new(targetInfo);
     }
 
     private static string GenerateSource(string containingTypeName, string containingNamespace, string containingClassVisibility, string containingType, ReactiveObjectInfo reactiveObjectInfo) =>