protected function rm($configOption) {
		if (isset($this->configuration[$configOption]))
			unset($this->configuration[$configOption]);
		return $this;
    }
protected function rm($configOption) {
		if (isset($this->configuration[$configOption]))
			unset($this->configuration[$configOption]);
		return $this;
    }
protected function rm ( $ configOption ) { if ( isset ( $ this -> configuration [ $ configOption ] ) ) unset ( $ this -> configuration [ $ configOption ] ) ; return $ this ; }
Remove a config option

@param string $configOption The config option to write

@return Configuration
Remove a config option