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16 calls to variable_del() in Drupal 4

forum_taxonomy in modules/forum.module
Implementation of hook_taxonomy().
node_search in modules/node.module
Implementation of hook_search().
system_settings_form_submit in modules/system.module
Execute the system_settings_form.
system_themes_submit in modules/system.module
system_theme_settings_submit in modules/system.module
system_update_119 in database/updates.inc
system_update_126 in database/updates.inc
system_update_132 in database/updates.inc
system_update_135 in database/updates.inc
system_update_137 in database/updates.inc
system_update_141 in database/updates.inc
system_update_151 in database/updates.inc
system_update_161 in database/updates.inc
system_update_165 in database/updates.inc
system_update_177 in database/updates.inc
update_fix_schema_version in ./update.php
If the schema version for Drupal core is stored in the variables table (4.6.x and earlier) move it to the schema_version column of the system table.