Remove references to now-removed app_single_page_icon

Bug: 1073584
Change-Id: Ieaad76c078d899174ace6e54cf9d0b195ef32df8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2448655Reviewed-by: Mohamed Heikal <mheikal@chromium.org>
Commit-Queue: Andrew Grieve <agrieve@chromium.org>
Cr-Commit-Position: refs/heads/master@{#814198}

chrome/android/chrome_public_apk_tmpl.gni

@@ -155,11 +155,6 @@ template("chrome_public_common_apk_or_module_tmpl") {
       "*ic_lock.*",  # Bottom edge seems misaligned.
     ]
 
-    if (min_sdk_version >= 21) {
-      # Resources used by AndroidManifest.xml only for pre-21.
-      resource_exclusion_regex += "|app_single_page_icon"
-    }
-
     # Note most of these, with the exception of resource_exclusion_exceptions,
     # are currently duplicated in system_webview_apk_tmpl.gni.
 

chrome/android/expectations/lint-suppressions.xml

@@ -332,7 +332,6 @@ Still reading?
     <ignore regexp="The resource `R.string.combined_notification_text` appears to be unused"/>
     <ignore regexp="The resource `R.plurals.public_notification_text` appears to be unused"/>
     <ignore regexp="The resource `R.mipmap.app_shortcut_icon` appears to be unused"/>
-    <ignore regexp="The resource `R.mipmap.app_single_page_icon` appears to be unused"/>
     <ignore regexp="The resource `R.string.app_banner_install` appears to be unused"/>
     <ignore regexp="The resource `R.string.iph_download_indicator_text` appears to be unused"/>
     <!--TODO(crbug.com/1106109): Remove this suppression once Most Visited Tiles header is implemented.-->