fix: Adjust style references for ScrollBar and ScrollViewer

Author: MartinZikmund

src/Uno.UI/UI/Xaml/Controls/ScrollBar/ScrollBar.xaml

@@ -1042,9 +1042,4 @@
 		</Setter>
 	</Style>
 
-	<macos:Style TargetType="ScrollBar" BasedOn="{StaticResource XamlNoAnimationScrollBar}" />
-	<netstdref:Style TargetType="ScrollBar" BasedOn="{StaticResource XamlNoAnimationScrollBar}" />
-	<ios:Style TargetType="ScrollBar" BasedOn="{StaticResource XamlDefaultScrollBar}" />
-	<android:Style TargetType="ScrollBar" BasedOn="{StaticResource XamlDefaultScrollBar}" />
-
 </ResourceDictionary>

src/Uno.UI/UI/Xaml/Controls/ScrollViewer/ScrollViewer.xaml

@@ -326,9 +326,4 @@
 		</Setter>
 	</Style>
 
-	<macos:Style TargetType="ScrollViewer" BasedOn="{StaticResource DefaultScrollViewerStyle}" />
-	<netstdref:Style TargetType="ScrollViewer" BasedOn="{StaticResource DefaultScrollViewerStyle}" />
-	<ios:Style TargetType="ScrollViewer" BasedOn="{StaticResource NativeScrollViewerStyle}" />
-	<android:Style TargetType="ScrollViewer" BasedOn="{StaticResource NativeScrollViewerStyle}" />
-
 </ResourceDictionary>