Remove dead Page Info permission strings and associated code.

chrome/browser/ui/cocoa/page_info/page_info_bubble_controller.mm

Index: chrome/browser/ui/cocoa/page_info/page_info_bubble_controller.mm
diff --git a/chrome/browser/ui/cocoa/page_info/page_info_bubble_controller.mm b/chrome/browser/ui/cocoa/page_info/page_info_bubble_controller.mm
index 4f50b6dacdb108c9616c69e78856bd9939a00038..3fa7b1135d43e8692cb9a88b446234cc275e9718 100644
--- a/chrome/browser/ui/cocoa/page_info/page_info_bubble_controller.mm
+++ b/chrome/browser/ui/cocoa/page_info/page_info_bubble_controller.mm
@@ -1115,9 +1115,6 @@ bool IsInternalURL(const GURL& url) {
   permissionsPresent_ = YES;
 
   if (permissionInfoList.size() > 0 || chosenObjectInfoList.size() > 0) {
-    base::string16 sectionTitle =
-        l10n_util::GetStringUTF16(IDS_PAGE_INFO_TITLE_SITE_PERMISSIONS);
-
     for (const auto& permission : permissionInfoList) {
       controlOrigin.y += kPermissionsVerticalSpacing;
       NSPoint rowBottomRight = [self addPermission:permission