Remove ZSH completion code

[alloy]

It’s not used by all users or even developers that work on CLAide, so it’s quality cannot be guaranteed.

In addition it appears that it doesn’t fully work well, @AliSoftware can you comment on that?

All in all, it’s bloat and as such should be moved out of this library, possibly into a plugin, which could just be a CocoaPods plugin for now.

[alloy]

And, with it, all code related to shell completion.

[AliSoftware]

By its nature of being statically generated it does not allow completion on arguments other than subcommands and options, namely path.

E.g. pod update OHH+[tab] does not autocomplete the path / filename

[kylef]

I agree that it should become a plugin. Considering that you need to invoke a command to get the completion code, I think it's fair that we just add an extra line to the instructions, it doesn't necessarily need to be bundled with CocoaPods.

$ gem install claide-completion
$ pod --completion-script > /usr/local/share/zsh/site-functions/_pod
$ exec zsh

[alloy]

Re-opening, because there still needs to be a claide-zsh_completion plugin, but the support is there.

[segiddins]

@alloy should be accomplished by https://github.com/CocoaPods/claide-completion, which I will release as soon as you give me a 👍

[alloy]

Hahaha, that readme is excellent, do it 👍

[segiddins]

❤️