class Rspec::Generators::InstallGenerator

def remove_warnings_configuration(spec_helper_path)
  empty_line = '^\n'
  comment_line = '^\s*#.+\n'
  gsub_file spec_helper_path,
            /#{empty_line}(#{comment_line})+\s+config\.warnings = true\n/,
            '',
            verbose: false
end