make _remove_content_2exp work with 0 array
make _remove_content_2exp work with 0 array

fredrik-johansson/flint2,dsroche/flint2,dsroche/flint2,dsroche/flint2,wbhart/flint2,wbhart/flint2,fredrik-johansson/flint2,fredrik-johansson/flint2,dsroche/flint2,wbhart/flint2