t1300: attempting to remove a non-existent .git/config is not an error
Since some tests before test number 79 ("quoting") are skipped, .git/config
does not exist and 'rm .git/config' fails. Fix this particular case.
While at it, move other instance of 'rm .git/config' that occur in this
file inside the test function to document that the test cases want to
protect themselves from remnants of earlier tests.
Signed-off-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>