omni: remove WallpaperCropper2 from build

OmniWallpaper has its own impl for that now

Change-Id: Ie343132c3a554d056a9c222bc1c0bbe1c9c471a8
diff --git a/config/packages.mk b/config/packages.mk
index 94e029d..96dcd00 100644
--- a/config/packages.mk
+++ b/config/packages.mk
@@ -10,7 +10,6 @@
     OmniJaws \
     MatLog \
     OmniStoreInstallerPrebuilt \
-    WallpaperCropper2 \
     OmniOta \
     OmniWallpaper