remove_deps

# File lib/bundler/injector.rb, line 128
    def remove_deps(gemfile_path)
      initial_gemfile = IO.readlines(gemfile_path)

      Bundler.ui.info "Removing gems from #{gemfile_path}"

      # evaluate the Gemfile we have
      builder = Dsl.new
      builder.eval_gemfile(gemfile_path)

      removed_deps = remove_gems_from_dependencies(builder, @deps, gemfile_path)

      # abort the opertion if no gems were removed
      # no need to operate on gemfile furthur
      return [] if removed_deps.empty?

      cleaned_gemfile = remove_gems_from_gemfile(@deps, gemfile_path)

      SharedHelpers.write_to_gemfile(gemfile_path, cleaned_gemfile)

      # check for errors
      # including extra gems being removed
      # or some gems not being removed
      # and return the actual removed deps
      cross_check_for_errors(gemfile_path, builder.dependencies, removed_deps, initial_gemfile)
    end