Chore: Remove dead code related to billing (#935)

- remove subscription model
- remove billing-related code

lib/webhooks/chargebee.rb

@@ -1,86 +0,0 @@
-# frozen_string_literal: true
-
-class Webhooks::Chargebee
-  SUPPORTED_EVENTS = [:subscription_created, :subscription_trial_end_reminder,
-                      :subscription_activated, :subscription_cancelled,
-                      :subscription_reactivated, :subscription_deleted,
-                      :subscription_renewed, :payment_source_added, :subscription_changed].freeze
-
-  attr_accessor :params, :account
-
-  def initialize(params)
-    @params = params
-  end
-
-  def consume
-    send(event_name) if supported_event?
-  end
-
-  private
-
-  def event_name
-    @params[:event_type]
-  end
-
-  def customer_id
-    @params[:content][:customer][:id]
-  end
-
-  def trial_ends_on
-    trial_end = @params[:content][:subscription][:trial_end]
-    DateTime.strptime(trial_end, '%s')
-  end
-
-  def supported_event?
-    SUPPORTED_EVENTS.include?(event_name.to_sym)
-  end
-
-  def subscription
-    @subscriptiom ||= Subscription.find_by(stripe_customer_id: customer_id)
-  end
-
-  def subscription_created
-    Raven.capture_message("subscription created for #{customer_id}")
-  end
-
-  def subscription_changed
-    if subscription.expiry != trial_ends_on
-      subscription.expiry = trial_ends_on
-      subscription.save
-      subscription.trial!
-    end
-  end
-
-  def subscription_trial_end_reminder
-    # Raven.capture_message("subscription trial end reminder for #{customer_id}")
-  end
-
-  def subscription_activated
-    subscription.active!
-    Raven.capture_message("subscription activated for #{customer_id}")
-  end
-
-  def subscription_cancelled
-    # if there is a reason field in response. Then cancellation is due to payment failure
-    subscription.cancelled!
-    Raven.capture_message("subscription cancelled for #{customer_id}")
-  end
-
-  def subscription_reactivated
-    # TODO: send mail to user that account is reactivated
-    subscription.active!
-    Raven.capture_message("subscription reactivated for #{customer_id}")
-  end
-
-  def subscription_renewed
-    # TODO: Needs this to show payment history.
-    Raven.capture_message("subscription renewed for #{customer_id}")
-  end
-
-  def subscription_deleted; end
-
-  def payment_source_added
-    Raven.capture_message("payment source added for #{customer_id}")
-    subscription.payment_source_added!
-  end
-end