Removing HTML from Email Notifications and bbPress Posts

I was given the following code for my child theme functions.php file, but it isn't working.

//Begin - Forums Remove HTML From Email Notifications
function wpse27856_set_content_type(){
return "text/html";
}
add_filter( 'wp_mail_content_type','wpse27856_set_content_type' );

// Begin - Forums Remove HTML From Posts
function bbp_tinymce_paste_plain_text( $plugins = array() ) {
$plugins[] = 'paste';
return $plugins;
}
add_filter( 'bbp_get_tiny_mce_plugins', 'bbp_tinymce_paste_plain_text' );

Please see screenshot of email notification. The forum post is similar.

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