diff --git a/modules/book.module b/modules/book.module
index d3de547ce29..72c06c62bb7 100644
--- a/modules/book.module
+++ b/modules/book.module
@@ -221,10 +221,6 @@ function book_validate(&$node) {
  * Implementation of hook_form().
  */
 function book_form(&$node) {
-  global $user;
-
-  $op = $_POST['op'];
-
   $output = form_select(t('Parent'), 'parent', ($node->parent ? $node->parent : arg(4)), book_toc($node->nid), t('The parent that this page belongs in. Note that pages whose parent is <top-level> are regarded as independent, top-level books.'));
 
   if (function_exists('taxonomy_node_form')) {
diff --git a/modules/book/book.module b/modules/book/book.module
index d3de547ce29..72c06c62bb7 100644
--- a/modules/book/book.module
+++ b/modules/book/book.module
@@ -221,10 +221,6 @@ function book_validate(&$node) {
  * Implementation of hook_form().
  */
 function book_form(&$node) {
-  global $user;
-
-  $op = $_POST['op'];
-
   $output = form_select(t('Parent'), 'parent', ($node->parent ? $node->parent : arg(4)), book_toc($node->nid), t('The parent that this page belongs in. Note that pages whose parent is <top-level> are regarded as independent, top-level books.'));
 
   if (function_exists('taxonomy_node_form')) {