src/Koldy/Mail/Adapter/AbstractMailAdapter.php
public function removeHeader(string $name)
    {
        if (array_key_exists($name, $this->headers)) {
            unset($this->headers[$name]);
        }

        return $this;
    }
public function removeHeader(string $name)
    {
        if (array_key_exists($name, $this->headers)) {
            unset($this->headers[$name]);
        }

        return $this;
    }
public function removeHeader ( string $ name ) { if ( array_key_exists ( $ name , $ this -> headers ) ) { unset ( $ this -> headers [ $ name ] ) ; } return $ this ; }
Remove the header

@param string $name

@return $this
Remove the header