[CodeHealth] Remove unused helper function ShowAppInfo

Bug: None
Change-Id: I418130add9341582be7a85e30f77c83818830e52
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2591108
Commit-Queue: Yi Gu <yigu@chromium.org>
Reviewed-by: David Roger <droger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#837072}

chrome/browser/ui/apps/app_info_dialog.h

@@ -53,12 +53,6 @@ void ShowAppInfoInAppList(gfx::NativeWindow parent,
                           const extensions::Extension* app);
 #endif
 
-// Shows the chrome app information in an independent dialog box and runs
-// close_callback when the app info window is closed.
-void ShowAppInfo(Profile* profile,
-                 const extensions::Extension* app,
-                 const base::Closure& close_callback);
-
 // Shows the chrome app information in a native dialog box.
 void ShowAppInfoInNativeDialog(content::WebContents* web_contents,
                                Profile* profile,

chrome/browser/ui/views/apps/app_info_dialog/app_info_dialog_views.cc

@@ -109,17 +109,6 @@ void ShowAppInfoInAppList(gfx::NativeWindow parent,
 }
 #endif
 
-void ShowAppInfo(Profile* profile,
-                 const extensions::Extension* app,
-                 const base::Closure& close_callback) {
-  views::DialogDelegate* dialog = CreateDialogContainerForView(
-      std::make_unique<AppInfoDialog>(profile, app), kDialogSize,
-      close_callback);
-  views::Widget* dialog_widget =
-      views::DialogDelegate::CreateDialogWidget(dialog, nullptr, nullptr);
-  dialog_widget->Show();
-}
-
 void ShowAppInfoInNativeDialog(content::WebContents* web_contents,
                                Profile* profile,
                                const extensions::Extension* app,