Remove custom image header if is activity component or is member activity page or is group activity page

gistfile1.php

add_action( 'after_setup_theme','bp_remove_custom_image_header', 100 );
function bp_remove_custom_image_header() {
  if ( bp_is_user_activity() || bp_is_activity_component() || bp_is_group_home() ) {
		//remove_custom_background();
		remove_custom_image_header();
	}
}