library/Rediska.php
public function removeServer($aliasOrConnection)
    {
        if ($aliasOrConnection instanceof Rediska_Connection) {
            $alias = $aliasOrConnection->getAlias();
        }

        if (!isset($this->_connections[$alias])) {
            throw new Rediska_Exception("Can't find connection '$alias'");
        }

        unset($this->_connections[$alias]);

        if ($this->_keyDistributor) {
            $this->_keyDistributor->removeConnection($alias);
        }

        return $this;
    }
public function removeServer($aliasOrConnection)
    {
        if ($aliasOrConnection instanceof Rediska_Connection) {
            $alias = $aliasOrConnection->getAlias();
        }

        if (!isset($this->_connections[$alias])) {
            throw new Rediska_Exception("Can't find connection '$alias'");
        }

        unset($this->_connections[$alias]);

        if ($this->_keyDistributor) {
            $this->_keyDistributor->removeConnection($alias);
        }

        return $this;
    }
Remove server

@param  $alias
@return void