Gallery: Removed "Settings" item from menu. (GallerySettings are empty)

As soon as GallerySettings.java has content, comments should be removed
from the files that this commit changes.
Menu without "Settings": http://i.imgur.com/gOX7x.png

Patchset2: Reverted AlbumSetPage.java changes

Change-Id: Idf8157849f9f394100ef858f4947e3f6cb734a93