Clean up ReaderMode OverlayPanel classes

chrome/browser/BUILD.gn

Index: chrome/browser/BUILD.gn
diff --git a/chrome/browser/BUILD.gn b/chrome/browser/BUILD.gn
index fcaac594b2a10d955ff50aeae6fe958027d3d487..3d5d913945d6caea7ebfc2f6c661d284a88bd022 100644
--- a/chrome/browser/BUILD.gn
+++ b/chrome/browser/BUILD.gn
@@ -2822,8 +2822,6 @@ split_static_library("browser") {
       "android/compositor/layer/layer.h",
       "android/compositor/layer/overlay_panel_layer.cc",
       "android/compositor/layer/overlay_panel_layer.h",
-      "android/compositor/layer/reader_mode_layer.cc",
-      "android/compositor/layer/reader_mode_layer.h",
       "android/compositor/layer/tab_handle_layer.cc",
       "android/compositor/layer/tab_handle_layer.h",
       "android/compositor/layer/tab_layer.cc",
@@ -2840,8 +2838,6 @@ split_static_library("browser") {
       "android/compositor/resources/toolbar_resource.h",
       "android/compositor/scene_layer/contextual_search_scene_layer.cc",
       "android/compositor/scene_layer/contextual_search_scene_layer.h",
-      "android/compositor/scene_layer/reader_mode_scene_layer.cc",
-      "android/compositor/scene_layer/reader_mode_scene_layer.h",
       "android/compositor/scene_layer/scene_layer.cc",
       "android/compositor/scene_layer/scene_layer.h",
       "android/compositor/scene_layer/static_tab_scene_layer.cc",
@@ -4181,7 +4177,6 @@ if (is_android) {
       "../android/java/src/org/chromium/chrome/browser/compositor/layouts/content/TabContentManager.java",
       "../android/java/src/org/chromium/chrome/browser/compositor/resources/ResourceFactory.java",
       "../android/java/src/org/chromium/chrome/browser/compositor/scene_layer/ContextualSearchSceneLayer.java",
-      "../android/java/src/org/chromium/chrome/browser/compositor/scene_layer/ReaderModeSceneLayer.java",
       "../android/java/src/org/chromium/chrome/browser/compositor/scene_layer/SceneLayer.java",
       "../android/java/src/org/chromium/chrome/browser/compositor/scene_layer/StaticTabSceneLayer.java",
       "../android/java/src/org/chromium/chrome/browser/compositor/scene_layer/TabListSceneLayer.java",