remove crypto balance from backend

app/models/balance.rb

@@ -1,35 +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)
-#
-class Balance < ApplicationRecord
-  include Trackable
-
-  belongs_to :user
-
-  validates :amount, presence: true, numericality: { greater_than_or_equal_to: 0 }
-
-  def withdrawal!(value)
-    update!(amount: amount - value)
-  end
-
-  def deposit!(value)
-    update!(amount: amount + value)
-  end
-end

app/models/user.rb

@@ -29,7 +29,6 @@ class User < ApplicationRecord
 
   has_many :documents, class_name: "UserDocument", dependent: :destroy
   has_many :stake_orders, dependent: :restrict_with_error
-  has_one :balance, dependent: :restrict_with_error
   has_one :fiat_balance, dependent: :restrict_with_error
 
   validates :first_name, :last_name, :email, presence: true