Remove unit test related to pre-4.1 term splitting during `wp_update_term()`.

After [33615], `wp_update_term()` no longer checks `$wp_db_version` before
attempting a split. This is because pre-4.1 versions of WordPress must be
allowed to update to 4.3+.

See #30261.
Built from https://develop.svn.wordpress.org/trunk@33616


git-svn-id: http://core.svn.wordpress.org/trunk@33583 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.3-RC2-33615';
+$wp_version = '4.3-RC2-33616';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.