DEV-18322 current trunk viewer doesn't start

remove erroneous texture entries which were probably the result of a
mismerge.

approved by steve & james.

indra/newview/skins/default/textures/textures.xml

@@ -365,10 +365,8 @@
   <texture name="icn_label_music.tga"/>
   <texture name="icn_label_media.tga"/>
   <texture name="arrow_down.tga"/>
-  <texture name="skin_thumbnail_modern.png" preload="true"/>
-  <texture name="skin_thumbnail_classic.png" preload="true"/>
   <texture name="cloud-particle.j2c" use_mips="true"/>
   
   <texture name="skin_thumbnail_default.png" preload="true" />
   <texture name="skin_thumbnail_silver.png" preload="true" />
-</textures>
\ No newline at end of file
+</textures>