Add try catch to avoid test failures on windows

osu.Game.Tests/NonVisual/CustomDataDirectoryTest.cs

@@ -313,10 +313,14 @@ namespace osu.Game.Tests.NonVisual
             {
                 base.Dispose(isDisposing);
 
+                try
+                {
                     // the storage may have changed from the initial location.
                     // this handles cleanup of the initial location.
                     InitialStorage.DeleteDirectory(string.Empty);
                 }
+                catch { }
+            }
         }
     }
 }