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

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

@@ -5,7 +5,6 @@
 <resources xmlns:tools="http://schemas.android.com/tools">
     <!-- Light theme color palette -->
     <color name="primary_text_light_theme">@color/photonInk80</color>
-    <color name="secondary_text_light_theme">@color/photonGrey50</color>
     <color name="contrast_text_light_theme">@color/primary_text_dark_theme</color>
     <color name="caption_text_light_theme">@color/photonLightGrey90</color>
     <color name="foundation_light_theme">@color/photonLightGrey20</color>
@@ -159,7 +158,7 @@
 
     <!-- Normal theme colors for light mode -->
     <color name="primary_text_normal_theme">@color/primary_text_light_theme</color>
-    <color name="secondary_text_normal_theme">@color/secondary_text_light_theme</color>
+    <color name="secondary_text_normal_theme">@color/photonGrey50</color>
     <color name="contrast_text_normal_theme">@color/contrast_text_light_theme</color>
     <color name="caption_text_normal_theme">@color/caption_text_light_theme</color>
     <color name="foundation_normal_theme">@color/foundation_light_theme</color>