mpkg: drop unused global variable filterout.
mpkg: drop unused global variable filterout.

SC2034 filterout appears unused. Verify it or export it.

See https://github.com/koalaman/shellcheck/wiki/SC2034.

Signed-off-by: Gaël PORTAY <1666f60cfa201a60b0ea694168a0b6932673170a@gmail.com>

gazoo74/mpkg,gazoo74/mpkg