Remove search field.

Hi,

I successfully install the plugin with Buddypress by flowing this instruction https://premium.wpmudev.org/forums/topic/doesnt-work-in-buddypress

So I am now using WordPress admin bar instead of BuddyPress admin bar, but now there is "Search field" in top right.

It's seems this search field can only look for post and not in core BuddyPress feature (groups, activity, members, forum).

How can I remove it from admin bar ?

thanks

Regards