t3020 (ls-files-error-unmatch): remove stray '1' from end of file

Acked-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t3020-ls-files-error-unmatch.sh

@@ -26,4 +26,3 @@ test_expect_success \
     'git ls-files --error-unmatch foo bar'
 
 test_done
-1