Remove app name from File.app's window.

ui/file_manager/file_manager/foreground/css/file_manager.css

Index: ui/file_manager/file_manager/foreground/css/file_manager.css
diff --git a/ui/file_manager/file_manager/foreground/css/file_manager.css b/ui/file_manager/file_manager/foreground/css/file_manager.css
index 58979b297585ed55350670fc7ccad5093d083791..e66ac842984a5f1274d9c0e27f0a7235b4b60666 100644
--- a/ui/file_manager/file_manager/foreground/css/file_manager.css
+++ b/ui/file_manager/file_manager/foreground/css/file_manager.css
@@ -144,18 +144,6 @@ a:focus {
   width: 190px;
 }
 
-.dialog-navigation-list-header {
-  flex: none;
-  height: 48px;  /* Keep in sync with #dialog-header. */
-  line-height: 45px;
-}
-
-.dialog-navigation-list-header #app-name {
-  color: #303030;
-  font-size: 130%;
-  margin: 0 15px;
-}
-
 .dialog-navigation-list-contents {
   display: flex;
   flex: 1 1 auto;