Finalize the split-off of imglib-ij

The code moved to its own repository:

	https://github.com/imglib/imglib-ij/

The commit 46138a89(Move non-imglib2-ij-specific manual test classes)
in the new repository corresponds to the commit 8544c7aa(Move
non-imglib2-ij-specific manual test classes) in

	https://github.com/imglib/imglib

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>