Post On Other Users Wall !

yz-post-on-other-users-wall.php

<?php
/**
 * Display Posting Form In Friends Wall.
 */
add_action( 'bp_before_member_activity_post_form', 'yzc_add_posting_form_in_friends_wall' );

function yzc_add_posting_form_in_friends_wall() {

    if ( is_user_logged_in() && ! bp_is_my_profile() && bp_is_user() ) {
        add_filter( 'gettext', 'yzc_change_whats_new_msg', 10 );
        bp_get_template_part( 'activity/post-form' );
        remove_filter( 'gettext', 'yzc_change_whats_new_msg', 10 );
    }

}

add_filter( 'bp_get_activity_action_pre_meta' , 'youzify_activity_action_wall_postss', 1000, 2 );
function youzify_activity_action_wall_postss(  $action, $activity  ) {

    $mentioned_user_id = bp_activity_get_meta( $activity->id, 'yzc_mentioned_wall' );

    if ( ! empty( $mentioned_user_id ) ) {

        if ( bp_is_my_profile() && $mentioned_user_id == bp_displayed_user_id() ) {
            return sprintf( __( '%1s wrote on your wall', 'youzify' ), bp_core_get_userlink( $activity->user_id ) );
        } else {
            return sprintf( __( '%1s wrote on %2s', 'youzify' ), bp_core_get_userlink( $activity->user_id ), bp_core_get_userlink( $mentioned_user_id ) );
        }
    }

    return $action;
}


add_action( 'youzify_after_adding_wall_post', 'yzc_mark_activity_as_mentioned', 10 );

function yzc_mark_activity_as_mentioned( $activity_id ) {
    bp_activity_update_meta( $activity_id, 'yzc_mentioned_wall', bp_displayed_user_id() );
}

/**
 * Edit Status Content To Include @Username.
 */
function yzc_edit_status_content( $status ) {

    if ( isset( $_POST['youzify_friend_display_name'] ) && ! empty( $_POST['youzify_friend_display_name'] ) ) {
        return  '@' .  $_POST['youzify_friend_display_name'] . ' ' . $status;
    }

    return $status;

}

add_filter( 'youzify_bp_activity_post_update_content', 'yzc_edit_status_content' );

function yzc_change_whats_new_msg( $translated_text ) {

    switch( $translated_text ) {
        case "What's new, %s?":
            return sprintf( 'Write something on %s wall...', bp_get_displayed_user_fullname() );
    }

    return $translated_text;
}




/**
 * Add Friends Post Form Custom Value.
 */
function yzc_add_activity_custom_input() {

    if ( ! bp_is_my_profile() && bp_is_user() ) { ?>
    <input type="hidden" name="youzify_friend_display_name" value="<?php echo bp_get_displayed_user_username(); ?>">
    <?php }

}

add_action ( 'bp_activity_post_form_options', 'yzc_add_activity_custom_input' );

/**
 * Edit Personal Feed To include Mentions.
 */
function yzc_edit_personal_activity_feed_to_include_mentions( $loop ) {
    if ( ! bp_is_my_profile() && bp_is_user() && bp_is_current_component( 'activity') && isset( $loop['scope'] ) && $loop['scope'] == 'just-me' ) {
        $loop['scope'] = 'just-me,mentions';
    }
    return $loop;
}

add_filter( 'bp_after_has_activities_parse_args', 'yzc_edit_personal_activity_feed_to_include_mentions' );

I want to remove this from the wall how can I do it? http://prntscr.com/oqf603