remove some redundant returns (#19137)

Co-authored-by: Julien Lebosquain <julien@lebosquain.net>

src/Avalonia.Base/Animation/Animators/BoolAnimator.cs

@@ -10,8 +10,6 @@
         {
             if(progress >= 1d)
                 return newValue;
-            if(progress >= 0)
-                return oldValue;
             return oldValue;
         }
     }

src/Avalonia.Controls/Automation/Peers/SelectingItemsControlAutomationPeer.cs

@@ -48,8 +48,6 @@ namespace Avalonia.Automation.Peers
                         }
                     }
                 }
-
-                return result;
             }
 
             return result;

src/Markup/Avalonia.Markup.Xaml.Loader/CompilerExtensions/AvaloniaXamlIlLanguageParseIntrinsics.cs

@@ -421,7 +421,7 @@ namespace Avalonia.Markup.Xaml.XamlIl.CompilerExtensions
                         return ReturnOnParseError($"x:Array element {element.Type.GetClrType().Name} is not assignable to the array element type {elementType.Name}", out result);
                     }
                 }
-                
+
                 if (types.AvaloniaList.MakeGenericType(elementType).IsAssignableFrom(type))
                 {
                     result = new AvaloniaXamlIlAvaloniaListConstantAstNode(node, types, type, elementType, nodes);
@@ -439,11 +439,8 @@ namespace Avalonia.Markup.Xaml.XamlIl.CompilerExtensions
                     result = new AvaloniaXamlIlArrayConstantAstNode(node, listType, elementType, nodes);
                     return true;
                 }
-
-                result = null;
-                return false;
             }
-            
+
             result = null;
             return false;
         }