remove class no longer required

lib/gitlab/cycle_analytics/events_fetcher.rb

-module Gitlab
-  module CycleAnalytics
-    class EventsFetcher
-      def initialize(project:, options:)
-        @query = EventsQuery.new(project: project, options: options)
-      end
-
-      def fetch(stage:)
-        @query.execute(stage)
-      end
-    end
-  end
-end