svn import: unlink downlaoded files

Actually removing the files that have been checked out of SVN,
after checking them into git of course, is a good idea...

Signed-Off-By: Matthias Urlichs <smurf@smurf.noris.de>

git-svnimport.perl

@@ -296,6 +296,7 @@ sub get_file($$$) {
 	my $sha = <$F>;
 	chomp $sha;
 	close $F;
+	unlink $name;
 	my $mode = "0644"; # SV does not seem to store any file modes
 	return [$mode, $sha, $path];
 }