Which Apache2 modules should I disable?

Hi all..

Here's the list of Apache2 modules I'm running on my VPS. I am basically running Drupal multi site on VPS. Which Apache2 modules is safe for me to disable

Loaded Modules:
 core_module (static)
 log_config_module (static)
 logio_module (static)
 mpm_prefork_module (static)
 http_module (static)
 so_module (static)
 alias_module (shared)
 auth_basic_module (shared)
 authn_file_module (shared)
 authz_default_module (shared)
 authz_groupfile_module (shared)
 authz_host_module (shared)
 authz_user_module (shared)
 autoindex_module (shared)
 cgi_module (shared)
 dir_module (shared)
 env_module (shared)
 mime_module (shared)
 negotiation_module (shared)
 php4_module (shared)
 rewrite_module (shared)
 setenvif_module (shared)
 status_module (shared)
Syntax OK

Thanks in advance!

k.