Remove unused packaged app window controls code.

extensions/renderer/resources/extensions_renderer_resources.grd

 <?xml version="1.0" encoding="UTF-8"?>
 <grit latest_public_release="0" current_release="1" output_all_resource_defines="false">
   <outputs>
     <output filename="grit/extensions_renderer_resources.h" type="rc_header">
       <emit emit_type='prepend'></emit>
     </output>
     <output filename="extensions_renderer_resources.pak" type="data_package" />
   </outputs>
   <release seq="1">
     <includes>
@@ skipping 54 matching lines @@
       <include name="IDR_EXTENSION_CUSTOM_BINDINGS_JS" file="extension_custom_bindings.js" type="BINDATA" />
       <include name="IDR_GREASEMONKEY_API_JS" file="greasemonkey_api.js" type="BINDATA" />
       <include name="IDR_I18N_CUSTOM_BINDINGS_JS" file="i18n_custom_bindings.js" type="BINDATA" />
       <include name="IDR_MOJO_PRIVATE_CUSTOM_BINDINGS_JS" file="mojo_private_custom_bindings.js" type="BINDATA" />
       <include name="IDR_PERMISSIONS_CUSTOM_BINDINGS_JS" file="permissions_custom_bindings.js" type="BINDATA" />
       <include name="IDR_PRINTER_PROVIDER_CUSTOM_BINDINGS_JS" file="printer_provider_custom_bindings.js" type="BINDATA" />
       <include name="IDR_RUNTIME_CUSTOM_BINDINGS_JS" file="runtime_custom_bindings.js" type="BINDATA" />
       <include name="IDR_SERVICE_WORKER_BINDINGS_JS" file="service_worker_bindings.js" type="BINDATA" />
       <include name="IDR_WEB_REQUEST_CUSTOM_BINDINGS_JS" file="web_request_custom_bindings.js" type="BINDATA" />
       <include name="IDR_WEB_REQUEST_INTERNAL_CUSTOM_BINDINGS_JS" file="web_request_internal_custom_bindings.js" type="BINDATA" />
-      <include name="IDR_WINDOW_CONTROLS_JS" file="window_controls.js" type="BINDATA" />
-      <include name="IDR_WINDOW_CONTROLS_TEMPLATE_HTML" file="window_controls_template.html" type="BINDATA" />
       <include name="IDR_WEB_VIEW_REQUEST_CUSTOM_BINDINGS_JS" file="guest_view/web_view/web_view_request_custom_bindings.js" type="BINDATA" />
 
       <!-- Custom types for APIs. -->
       <include name="IDR_STORAGE_AREA_JS" file="storage_area.js" type="BINDATA" />
 
       <!-- Platform app support. -->
       <include name="IDR_PLATFORM_APP_CSS" file="platform_app.css" type="BINDATA" />
       <include name="IDR_PLATFORM_APP_JS" file="platform_app.js" type="BINDATA" />
 
       <!-- Extension styles. -->
       <include name="IDR_EXTENSION_FONTS_CSS" file="extension_fonts.css" type="BINDATA"/>
 
       <!-- Media Router Mojo service and bindings. -->
       <if expr="enable_media_router">
         <include name="IDR_MEDIA_ROUTER_MOJOM_JS" file="${mojom_root}\chrome\browser\media\router\mojo\media_router.mojom.js" use_base_dir="false" type="BINDATA" />
         <include name="IDR_MEDIA_ROUTER_BINDINGS_JS" file="media_router_bindings.js" type="BINDATA" />
         <include name="IDR_MOJO_TIME_MOJOM_JS" file="${mojom_root}\mojo\common\time.mojom.js" use_base_dir="false" type="BINDATA" />
       </if>
     </includes>
     <structures>
       <!-- Extension styles. -->
       <structure name="IDR_EXTENSION_CSS" file="extension.css" type="chrome_html" flattenhtml="true" />
     </structures>
   </release>
 </grit>