remove crypto balance from backend

spec/factories/balances.rb

@@ -1,26 +0,0 @@
-# frozen_string_literal: true
-
-# == Schema Information
-#
-# Table name: balances
-#
-#  id         :bigint           not null, primary key
-#  amount     :decimal(20, 10)  default(0.0), not null
-#  created_at :datetime         not null
-#  updated_at :datetime         not null
-#  user_id    :bigint           not null
-#
-# Indexes
-#
-#  index_balances_on_user_id  (user_id)
-#
-# Foreign Keys
-#
-#  fk_rails_...  (user_id => users.id)
-#
-FactoryBot.define do
-  factory :balance do
-    association :user
-    amount { (rand * (10000 - 0) + 0) }
-  end
-end