use packaged "opencv" from OS

rock.osdeps

@@ -121,15 +121,7 @@ qt-designer:
     macos-brew: qt4
 
 opencv:
-    debian:
-        'wheezy,sid':
-                - libopencv-dev
-    ubuntu:
-        '10.04,10.10,11.04,11.10': nonexistent
-        default:
-                - libopencv-dev
-                - libcv-dev
-                - libhighgui-dev
+    debian, ubuntu: libopencv-dev
     gentoo: media-libs/opencv
     fedora: opencv-devel
     arch,manjarolinux: opencv

source.yml

@@ -83,10 +83,6 @@ version_control:
       type: archive
       url: https://github.com/SINTEF-Geometry/SISL/archive/SISL-4.6.0.tar.gz
       update_cached_file: false
-    - external/opencv:
-      type: archive
-      url: http://downloads.sourceforge.net/project/opencvlibrary/opencv-unix/2.4.9/opencv-2.4.9.zip
-      update_cached_file: false
 
 overrides:
     - ^(orogen|typelib|rtt|utilrb|utilmm|rtt_typelib|tools/metaruby)$: