Remove WordPress body class

snippet.php

add_filter( 'body_class', 'leland_remove_tag_body_class' );
  
function leland_remove_tag_body_class( $classes ) {
  $class_to_remove = 'tag';

  $remove = array_search( $class_to_remove, $classes );

  if ( $remove ) {
    unset( $classes[$remove] );
  }

  return $classes;
}