t3000 (ls-files -o): widen description to reflect current tests

Remove the mention of symlinks from the test description because
several tests that are not related to symlinks have been added since
this file was introduced long ago.

Signed-off-by: Kyle Meyer <kyle@kyleam.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t3000-ls-files-others.sh

@@ -3,7 +3,7 @@
 # Copyright (c) 2005 Junio C Hamano
 #
 
-test_description='git ls-files test (--others should pick up symlinks).
+test_description='basic tests for ls-files --others
 
 This test runs git ls-files --others with the following on the
 filesystem.