Docs: Remove redundant PHP tags from `get_object_taxonomies()` description.

Props dotancohen.
Fixes #35553.

git-svn-id: https://develop.svn.wordpress.org/trunk@36377 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/taxonomy.php

@@ -161,7 +161,7 @@ function get_taxonomies( $args = array(), $output = 'names', $operator = 'and' )
  * It appears that this function can be used to find all of the names inside of
  * $wp_taxonomies global variable.
  *
- * `<?php $taxonomies = get_object_taxonomies('post'); ?>` Should
+ * `$taxonomies = get_object_taxonomies( 'post' )` Should
  * result in `Array( 'category', 'post_tag' )`
  *
  * @since 2.3.0