remove tests that are now in upstream

_test/tests/inc/tar.test.php

_test/tests/inc/tar/block.txt

_test/tests/inc/tar/foobar/testdata2.txt

_test/tests/inc/tar/longpath-gnu.tgz

_test/tests/inc/tar/longpath-ustar.tgz

_test/tests/inc/tar/tarbomb.tgz

_test/tests/inc/tar/test.tar

_test/tests/inc/tar/test.tbz

_test/tests/inc/tar/test.tgz

_test/tests/inc/tar/testdata1.txt

_test/tests/inc/tar/zero.txt