Tests: removed unneeded require from proxy_ssl_keepalive.t.

Author: mdounin

proxy_ssl_keepalive.t

@@ -22,9 +22,6 @@ use Test::Nginx;
 select STDERR; $| = 1;
 select STDOUT; $| = 1;
 
-eval { require IO::Socket::SSL; };
-plan(skip_all => 'IO::Socket::SSL not installed') if $@;
-
 my $t = Test::Nginx->new()->has(qw/http http_ssl proxy upstream_keepalive/)
 	->has_daemon('openssl')->plan(3)
 	->write_file_expand('nginx.conf', <<'EOF');