Revert "Require gems in bin/hanami file"

[jodosha]

This reverts commit 9a8db04.

We use hanami bin both inside and outside Hanami projects. Inside, with the presence of a Gemfile, requiring hanami/setup just works fine. But outside, without a Gemfile, hanami crashes.

 ➜ hanami version
/Users/luca/.gem/ruby/2.3.1/gems/bundler-1.12.5/lib/bundler.rb:170:in `rescue in root': Could not locate Gemfile or .bundle/ directory (Bundler::GemfileNotFound)
    from /Users/luca/.gem/ruby/2.3.1/gems/bundler-1.12.5/lib/bundler.rb:166:in `root'
    from /Users/luca/.gem/ruby/2.3.1/gems/bundler-1.12.5/lib/bundler.rb:74:in `bundle_path'
    from /Users/luca/.gem/ruby/2.3.1/gems/bundler-1.12.5/lib/bundler.rb:414:in `configure_gem_home_and_path'
    from /Users/luca/.gem/ruby/2.3.1/gems/bundler-1.12.5/lib/bundler.rb:60:in `configure'
    from /Users/luca/.gem/ruby/2.3.1/gems/bundler-1.12.5/lib/bundler.rb:121:in `definition'
    from /Users/luca/.gem/ruby/2.3.1/gems/bundler-1.12.5/lib/bundler.rb:91:in `setup'
    from /Users/luca/.gem/ruby/2.3.1/gems/bundler-1.12.5/lib/bundler.rb:102:in `require'
    from /Users/luca/.gem/ruby/2.3.1/gems/hanami-0.8.0/lib/hanami/setup.rb:3:in `<top (required)>'
    from /Users/luca/.rubies/ruby-2.3.1/lib/ruby/site_ruby/2.3.0/rubygems/core_ext/kernel_require.rb:68:in `require'
    from /Users/luca/.rubies/ruby-2.3.1/lib/ruby/site_ruby/2.3.0/rubygems/core_ext/kernel_require.rb:68:in `require'
    from /Users/luca/.gem/ruby/2.3.1/gems/hanami-0.8.0/bin/hanami:4:in `<top (required)>'
    from /Users/luca/.gem/ruby/2.3.1/bin/hanami:22:in `load'
    from /Users/luca/.gem/ruby/2.3.1/bin/hanami:22:in `<main>'

This problem affects hanami version and hanami new, which are the only two commands that are run outside of a Hanami project.

---

Ref #566
FYI @davydovanton

[davydovanton]

it's really strange 😰
any way, thanks for mention me, @jodosha 👍

[coveralls]

Coverage increased (+0.003%) to 92.593% when pulling 6eec646 on fix/remove-require-gems-from-hanami-bin into 9ad448d on master.

[jodosha]

@davydovanton To try it you should install all the gems locally. This simulates end users installing our gems from Rubygems.

I created this quick and dirty script for the job: https://github.com/jodosha/dotfiles/blob/master/bin/install-hanami-head

Then you should try to do hanami version.