Remove invalid option for curl_setopt_array

[rtio]

why

This change removes an invalid option for curl_setopt_array.

This closes #24

All valid options.

[michaelbutler]

Sorry for the huge delay, this looks good, but...

I do see that CURLINFO_EFFECTIVE_URL is a valid option but for curl_getinfo not for curl_setopt. can we confirm that curl_getinfo isn't called with this option set? @rtio

[rtio]

Hi @michaelbutler hope you're doing well and thank you for the review, much appreciated!

I do see that CURLINFO_EFFECTIVE_URL is a valid option but for curl_getinfo not for curl_setopt. can we confirm that curl_getinfo isn't called with this option set? @rtio

There are 5 calls to curl_getinfo in the code and none of them pass CURLINFO_EFFECTIVE_URL as a parameter or leverage on that result. BTW, this field is returned when using this function with no parameters. So I'd say it would be safe to remove it.