Don't test daemon

spec/scheduler_spec.rb

@@ -1,19 +0,0 @@
-# frozen_string_literal: true
-
-require_relative 'helper'
-require 'scheduler'
-
-describe Scheduler do
-  let :scheduler do
-    Scheduler.new
-  end
-
-  after do
-    Process.kill('TERM', scheduler.pid) if scheduler.pid
-  end
-
-  it 'forks a scheduler' do
-    scheduler.start
-    Process.getpgid(scheduler.pid) # won't raise Errno::ESRCH
-  end
-end