[directorytree] Remove 'FolderShortcut' UMA on item that is not a shortcut

Bug: None
Change-Id: I028af5cfa3e1481d3b40852529f3b2aea0d38308
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2096065Reviewed-by: Luciano Pacheco <lucmult@chromium.org>
Commit-Queue: Anand Mistry <amistry@chromium.org>
Cr-Commit-Position: refs/heads/master@{#748587}

ui/file_manager/file_manager/foreground/js/ui/directory_tree.js

@@ -1170,7 +1170,6 @@ class VolumeItem extends DirectoryItem {
     const onEntryResolved = (entry) => {
       // Changes directory to the model item's root directory if needed.
       if (!util.isSameEntry(directoryModel.getCurrentDirEntry(), entry)) {
-        metrics.recordUserAction('FolderShortcut.Navigate');
         directoryModel.changeDirectoryEntry(entry);
       }
       // In case of failure in resolveDisplayRoot() in the volume's constructor,