fix: Warning CS0168 The variable 'e' is declared but never used

tests/Avalonia.IntegrationTests.Appium/WindowTests.cs

@@ -230,7 +230,7 @@ namespace Avalonia.IntegrationTests.Appium
                         PixelRect.Parse(_session.FindElementByAccessibilityId("ScreenRect").Text),
                         double.Parse(_session.FindElementByAccessibilityId("Scaling").Text));
                 }
-                catch (OpenQA.Selenium.NoSuchElementException e) when (retry++ < 3)
+                catch (OpenQA.Selenium.NoSuchElementException) when (retry++ < 3)
                 {
                     // MacOS sometimes seems to need a bit of time to get itself back in order after switching out
                     // of fullscreen.

tests/Avalonia.IntegrationTests.Appium/WindowTests_MacOS.cs

@@ -30,7 +30,7 @@ namespace Avalonia.IntegrationTests.Appium
                     tab.Click();
                     return;
                 }
-                catch (WebDriverException e) when (retry++ < 3)
+                catch (WebDriverException) when (retry++ < 3)
                 {
                     // MacOS sometimes seems to need a bit of time to get itself back in order after switching out
                     // of fullscreen.