[fenix] For https://github.com/mozilla-mobile/fenix/issues/21973 - Remove @color/onboarding_illustration_deselected_dark_theme redirection

app/src/main/res/values-night/colors.xml

@@ -39,7 +39,7 @@
     <color name="onboarding_card_background_start_gradient_normal_theme">@color/accent_bright_dark_theme</color>
     <color name="onboarding_card_background_end_gradient_normal_theme">@color/accent_high_contrast_dark_theme</color>
     <color name="onboarding_illustration_selected_normal_theme">@color/accent_dark_theme</color>
-    <color name="onboarding_illustration_deselected_normal_theme">@color/onboarding_illustration_deselected_dark_theme</color>
+    <color name="onboarding_illustration_deselected_normal_theme">#99FBFBFE</color>
     <color name="add_on_private_browsing_exterior_circle_background_normal_theme">@color/accent_dark_theme</color>
     <color name="add_on_private_browsing_interior_icon_background_normal_theme">@color/photonWhite</color>
     <color name="prompt_login_edit_text_cursor_color_normal_theme">@color/photonViolet50</color>

app/src/main/res/values/colors.xml

@@ -30,7 +30,6 @@
     <color name="accent_dark_theme">@color/photonViolet50</color>
     <color name="accent_bright_dark_theme">@color/photonViolet70</color>
     <color name="accent_high_contrast_dark_theme">@color/photonViolet40</color>
-    <color name="onboarding_illustration_deselected_dark_theme">#99FBFBFE</color>
     <color name="search_suggestion_indicator_icon_color_dark_theme">@color/photonGreen60</color>
 
     <color name="mozac_widget_favicon_background_dark_theme">@color/photonDarkGrey50</color>
@@ -85,7 +84,7 @@
     <color name="onboarding_card_background_start_gradient_private_theme">@color/photonViolet60</color>
     <color name="onboarding_card_background_end_gradient_private_theme">@color/photonPurple50</color>
     <color name="onboarding_illustration_selected_private_theme">@color/accent_private_theme</color>
-    <color name="onboarding_illustration_deselected_private_theme">@color/onboarding_illustration_deselected_dark_theme</color>
+    <color name="onboarding_illustration_deselected_private_theme">#99FBFBFE</color>
     <color name="add_on_private_browsing_exterior_circle_background_private_theme">@color/accent_private_theme</color>
     <color name="add_on_private_browsing_interior_icon_background_private_theme">@color/photonWhite</color>
     <color name="prompt_login_edit_text_cursor_color_private_theme">@color/photonViolet50</color>