Remove HTTP dependency

[fanfilmu]

Proposed solution for #80

[mdavidn]

To avoid a breaking change to the API, you could use Net::HTTP rather than the http gem.

Net::HTTP ships with Ruby. Any application that prefers a different client library (e.g. for VCR) should simply avoid the :remote option.

[fanfilmu]

Hi and thank you for your comment @mdavidn !

Sure, it is an option. Depends on what @pythonicrubyist decides, but in my opinion, we should not avoid the breaking change here... For me, it seems really weird for Excel parser library to be able to download files from the internet.

I would suggest going with the Unix philosophy here, do one thing and do it well ;)

[mdavidn]

I don't disagree. I just don't want a major version bump to be a reason to keep the http dependency.

[savfischer]

I really appreciate the ease of parsing excel files from a remote location this allows. If it is removed maybe it could be a plugin, like shrine does.

[mdavidn]

Ruby already makes it very easy to read files from a remote location. This library does not need additional dependencies to support that feature.

require 'open-uri'
URI('https://path/to/excel/file.xlsx').read

[pythonicrubyist]

I completely agree that this library should not have had the remote option at the first place, but I do not want to introduce a breaking change to a library with over over a milliton downloads.