diff --git a/modules/forum/forum.install b/modules/forum/forum.install
index 9848a42f6dc9f43e7bbd971525faad1f5140ade3..979acacc5cdfb614ae553991d0a27e8fcf86337b 100644
--- a/modules/forum/forum.install
+++ b/modules/forum/forum.install
@@ -37,7 +37,6 @@ function forum_enable() {
       'machine_name' => 'forums',
       'description' => t('Forum navigation vocabulary'),
       'hierarchy' => 1,
-      'relations' => 0,
       'module' => 'forum',
       'weight' => -10,
     );
diff --git a/modules/taxonomy/taxonomy.install b/modules/taxonomy/taxonomy.install
index c2d58c7596c9d6b1010f976f490bae8199abf9e8..22d1587c04ff32e5c4a875ceef49842fb3f0c2d1 100644
--- a/modules/taxonomy/taxonomy.install
+++ b/modules/taxonomy/taxonomy.install
@@ -134,14 +134,6 @@ function taxonomy_schema() {
         'description' => 'Description of the vocabulary.',
         'translatable' => TRUE,
       ),
-      'relations' => array(
-        'type' => 'int',
-        'unsigned' => TRUE,
-        'not null' => TRUE,
-        'default' => 0,
-        'size' => 'tiny',
-        'description' => 'Whether or not related terms are enabled within the vocabulary. (0 = disabled, 1 = enabled)',
-      ),
       'hierarchy' => array(
         'type' => 'int',
         'unsigned' => TRUE,