remove crypto balance from backend

spec/policies/balance_policy_spec.rb

@@ -1,42 +0,0 @@
-# frozen_string_literal: true
-require "rails_helper"
-
-RSpec.describe(BalancePolicy, type: :policy) do
-  context "when user has balances" do
-    it "return only balances from a user" do
-      create(:balance)
-      create(:balance)
-
-      user = build(:user)
-      balance = create(:balance, user: user)
-
-      balances = BalancePolicy::Scope.new(user, Balance).resolve
-
-      expect(balances).to(eq([balance]))
-    end
-  end
-
-  context "when user has not balances" do
-    it "return empty array" do
-      create(:balance)
-      create(:balance)
-
-      user = build(:user)
-
-      balances = BalancePolicy::Scope.new(user, Balance).resolve
-
-      expect(balances).to(eq([]))
-    end
-  end
-
-  context "when user is nil" do
-    it "return empty array" do
-      create(:balance)
-      create(:balance)
-
-      balances = BalancePolicy::Scope.new(nil, Balance).resolve
-
-      expect(balances).to(eq([]))
-    end
-  end
-end