remove dead code

app/controllers/api/ical_controller.rb

@@ -1,19 +0,0 @@
-# frozen_string_literal: true
-
-# API Controller for resources of type iCalendar
-class API::IcalController < API::ApiController
-  respond_to :json
-
-  def externals
-    require 'net/http'
-    require 'uri'
-
-    ics = Net::HTTP.get(URI.parse('https://calendar.google.com/calendar/ical/sylvain%40sleede.com/public/basic.ics'))
-
-    require 'icalendar'
-    require 'icalendar/tzinfo'
-
-    cals = Icalendar::Calendar.parse(ics)
-    @events = cals.first.events
-  end
-end