remove chosenRank type, keep only column

Signed-off-by: philippe lhardy <philippe.lhardy@astrolabe.coop>

Author: philippe lhardy

lib/Db/Poll.php

@@ -187,7 +187,6 @@ public function __construct() {
 		$this->addType('anonymous', 'integer');
 		$this->addType('allowComment', 'integer');
 		$this->addType('allowMaybe', 'integer');
-		$this->addType('chosenRank', 'string');
 		$this->addType('proposalsExpire', 'integer');
 		$this->addType('voteLimit', 'integer');
 		$this->addType('optionLimit', 'integer');