Refactor parent class declaration generation

Replaces LINQ ToArray with a range operator in GenerateParentClassDeclarations for improved clarity. Also removes an unused using directive from ReactiveCommandGenerator.cs.

Author: ChrisPulman

src/ReactiveUI.SourceGenerators.Roslyn/ReactiveCommand/ReactiveCommandGenerator.Execute.cs

@@ -142,7 +142,7 @@ public partial class ReactiveCommandGenerator
     private static string GenerateSource(string containingTypeName, string containingNamespace, string containingClassVisibility, string containingType, CommandInfo[] commands)
     {
         // Get Parent class details from properties.ParentInfo
-        var (parentClassDeclarationsString, closingBrackets) = TargetInfo.GenerateParentClassDeclarations(commands.Select(p => p.TargetInfo.ParentInfo).ToArray());
+        var (parentClassDeclarationsString, closingBrackets) = TargetInfo.GenerateParentClassDeclarations([.. commands.Select(p => p.TargetInfo.ParentInfo)]);
 
         var classes = GenerateClassWithCommands(containingTypeName, containingNamespace, containingClassVisibility, containingType, commands);
 

src/ReactiveUI.SourceGenerators.Roslyn/ReactiveCommand/ReactiveCommandGenerator.cs

@@ -9,7 +9,6 @@
 using Microsoft.CodeAnalysis;
 using Microsoft.CodeAnalysis.CSharp.Syntax;
 using Microsoft.CodeAnalysis.Text;
-using ReactiveUI.SourceGenerators.Extensions;
 using ReactiveUI.SourceGenerators.Helpers;
 
 namespace ReactiveUI.SourceGenerators;