android: Remove duplicate entry

Change-Id: I08cedea4834230fde21ed07b463b252b5b7d30a8
Signed-off-by: Humberto Borba <humberos@gmail.com>

remove.xml

@@ -127,6 +127,7 @@
   <remove-project name="platform/packages/apps/QuickSearchBox" />
   <remove-project name="platform/packages/apps/Settings" />
   <remove-project name="platform/packages/apps/UnifiedEmail" />
+  <remove-project name="platform/packages/apps/WallpaperPicker" />
   <remove-project name="platform/packages/inputmethods/LatinIME" />
   <remove-project name="platform/packages/inputmethods/OpenWnn" />
   <remove-project name="platform/packages/providers/DownloadProvider" />