Revert [38859] due to an incomplete implementation.

See https://core.trac.wordpress.org/ticket/37128#comment:27.
See #37128.

git-svn-id: https://develop.svn.wordpress.org/trunk@38863 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/category-template.php

@@ -99,6 +99,45 @@ function get_the_category( $id = false ) {
 	return apply_filters( 'get_the_categories', $categories, $id );
 }
 
+/**
+ * Sort categories by name.
+ *
+ * Used by usort() as a callback, should not be used directly. Can actually be
+ * used to sort any term object.
+ *
+ * @since 2.3.0
+ * @access private
+ *
+ * @param object $a
+ * @param object $b
+ * @return int
+ */
+function _usort_terms_by_name( $a, $b ) {
+	return strcmp( $a->name, $b->name );
+}
+
+/**
+ * Sort categories by ID.
+ *
+ * Used by usort() as a callback, should not be used directly. Can actually be
+ * used to sort any term object.
+ *
+ * @since 2.3.0
+ * @access private
+ *
+ * @param object $a
+ * @param object $b
+ * @return int
+ */
+function _usort_terms_by_ID( $a, $b ) {
+	if ( $a->term_id > $b->term_id )
+		return 1;
+	elseif ( $a->term_id < $b->term_id )
+		return -1;
+	else
+		return 0;
+}
+
 /**
  * Retrieve category name based on category ID.
  *