Only specify theming parameters in settings.ini

usr/share/themes/Lubuntu-default/gtk-3.0/settings.ini

@@ -1,18 +1,3 @@
 [Settings]
 gtk-auto-mnemonics = 1
-gtk-theme-name = Lubuntu-default
-gtk-icon-theme-name = lubuntu
-gtk-font-name = Ubuntu 9
-gtk-cursor-theme-name = DMZ_Black
-gtk-cursor-theme-size = 0
-gtk-toolbar-style = GTK_TOOLBAR_BOTH_HORIZ
-gtk-toolbar-icon-size = GTK_ICON_SIZE_SMALL_TOOLBAR
-gtk-button-images = 1
-gtk-menu-images = 1
-gtk-enable-event-sounds = 1
-gtk-enable-input-feedback-sounds = 1
-gtk-xft-antialias = 1
-gtk-xft-hinting = 1
-gtk-xft-hintstyle = hintfull
-gtk-xft-rgba = (null)
 gtk-color-scheme = "base_color:#f7f7f7\nbg_color:#dcdcdc\ntooltip_bg_color:#F5F5B5\nselected_bg_color:#a2b8ca\ntext_color:#2c2c2c\nfg_color:#2c2c2c\ntooltip_fg_color:#000000\nselected_fg_color:#F5F5F5\nlink_color:#DD4814\nbg_color_dark:#c9c9c9\nfg_color_dark:#2c2c2c"