diff --git a/app/src/main/res/values/attrs.xml b/app/src/main/res/values/attrs.xml
index 5d0762abd5..cf117b8218 100644
--- a/app/src/main/res/values/attrs.xml
+++ b/app/src/main/res/values/attrs.xml
@@ -58,8 +58,6 @@
 
     <!-- Tab tray -->
     <attr name="tabTrayItemMediaBackground" format="reference" />
-    <attr name="tabTrayHeadingIcon" format="reference" />
-    <attr name="tabTrayHeadingIconInactive" format="reference" />
     <attr name="tabTrayThumbnailItemBackground" format="reference" />
     <attr name="tabTrayThumbnailIcon" format="reference" />
 
diff --git a/app/src/main/res/values/styles.xml b/app/src/main/res/values/styles.xml
index c77659900b..70aded09cf 100644
--- a/app/src/main/res/values/styles.xml
+++ b/app/src/main/res/values/styles.xml
@@ -90,8 +90,6 @@
         <item name="mozac_widget_favicon_border_color">@color/mozac_widget_favicon_border_normal_theme</item>
 
         <item name="tabTrayItemMediaBackground">@color/tab_tray_item_media_background_normal_theme</item>
-        <item name="tabTrayHeadingIcon">@color/tab_tray_heading_icon_normal_theme</item>
-        <item name="tabTrayHeadingIconInactive">@color/tab_tray_heading_icon_inactive_normal_theme</item>
         <item name="tabTrayThumbnailItemBackground">@color/tab_tray_item_thumbnail_background_normal_theme</item>
         <item name="tabTrayThumbnailIcon">@color/tab_tray_item_thumbnail_icon_normal_theme</item>
 
@@ -272,8 +270,6 @@
 
         <!-- Tab Tray -->
         <item name="tabTrayItemMediaBackground">@color/tab_tray_item_media_background_private_theme</item>
-        <item name="tabTrayHeadingIcon">@color/tab_tray_heading_icon_dark_theme</item>
-        <item name="tabTrayHeadingIconInactive">@color/tab_tray_heading_icon_inactive_dark_theme</item>
         <item name="tabTrayThumbnailItemBackground">@color/tab_tray_item_thumbnail_background_normal_theme</item>
         <item name="tabTrayThumbnailIcon">@color/tab_tray_item_thumbnail_icon_normal_theme</item>