t9700: remove useless check

t9700 used to check if the basename of the current directory is
'trash directory', the expensive way.

However, there is absolutely no good reason why this test should not
run in, say 'life is good' or 'i love tests'.  So remove the check
altogether.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t9700/test.pl

@@ -14,10 +14,7 @@ use File::Temp;
 BEGIN { use_ok('Git') }
 
 # set up
-our $repo_dir = "trash directory";
 our $abs_repo_dir = Cwd->cwd;
-die "this must be run by calling the t/t97* shell script(s)\n"
-    if basename(Cwd->cwd) ne $repo_dir;
 ok(our $r = Git->repository(Directory => "."), "open repository");
 
 # config