String removals in gnome-backgrounds

[Thomas Wood <thos gnome org>]

Several strings have been removed from gnome-backgrounds, so could 
translators have a look and remove any redundant translations.

Here is a list of removed strings:

< #: abstract/gnome-abstract.xml.in.in.h:1
< msgid "Due (Abstract)"
< msgstr ""

< #: abstract/gnome-abstract.xml.in.in.h:2
< msgid "Due Alternate (Abstract)"
< msgstr ""

< #: abstract/gnome-abstract.xml.in.in.h:3
< msgid "Scie (Abstract)"
< msgstr ""

< #: abstract/gnome-abstract.xml.in.in.h:4
< msgid "Scie Alternate (Abstract)"
< msgstr ""

< msgid "Black (GNOME Branded)"
< msgstr ""

< #: branded/gnome-branded.xml.in.in.h:4
< msgid "Hills (GNOME Branded)"
< msgstr ""

< #: tiles/gnome-tiles.xml.in.in.h:4
< msgid "Greche Pattern (Tile)"
< msgstr ""

< #: tiles/gnome-tiles.xml.in.in.h:5
< msgid "Leather (Tile)"
< msgstr ""

< #: tiles/gnome-tiles.xml.in.in.h:6
< msgid "Stone Wall Pattern (Tile)"
< msgstr ""

< msgid "Grid (Translucent)"
< msgstr ""

< #: translucent/gnome-translucent.xml.in.in.h:3
< msgid "Masle (Translucent)"
< msgstr ""

< #: translucent/gnome-translucent.xml.in.in.h:6
< msgid "Waves (Translucent)"
< msgstr ""