t2021: fix platform-specific leftover cruft
t2021.6 existed to test the status of a symlink that was left around by
previous tests. It tried to also clean up the symlink after it was done
so that subsequent tests wouldn't be tripped up by it. Unfortunately,
since this test had a SYMLINK prerequisite, that made the cleanup
platform dependent...and made a testcase I was trying to add to this
testsuite fail (that testcase will be included in the next patch).
Before we go and add new testcases, fix this cleanup by moving it into a
separate test.
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>