Revert "Validate voucher code doesn't contain new line characters"

This reverts commit 0c0b85f4c4.

app/models/voucher.rb

@@ -1,8 +1,6 @@
 # frozen_string_literal: false
 
 class Voucher < ApplicationRecord
-  INVALID_CODE_REGEX = /(\r|\n)/
-
   acts_as_paranoid
 
   belongs_to :enterprise, optional: false
@@ -14,8 +12,7 @@ class Voucher < ApplicationRecord
 
   before_validation :strip_code
 
-  validates :code, format: { without: INVALID_CODE_REGEX },
-                   length: { maximum: STRING_COLUMN_LIMIT },
+  validates :code, length: { maximum: STRING_COLUMN_LIMIT },
                    presence: true, uniqueness: { scope: :enterprise_id }
   validates :amount, presence: true, numericality: { greater_than: 0 }
 

spec/models/voucher_spec.rb

@@ -27,16 +27,6 @@ describe Voucher do
     it { is_expected.to validate_uniqueness_of(:code).scoped_to(:enterprise_id) }
     it { is_expected.to validate_presence_of(:amount) }
     it { is_expected.to validate_numericality_of(:amount).is_greater_than(0) }
-    it { is_expected.to allow_value("somethingvalid").for(:code) }
-
-    it "is invalid if the code contains certain forbidden characters e.g. new lines" do
-      voucher = subject
-      ["\n", "\r"].each do |forbidden_code_character|
-        voucher.code = "somethingvalid#{forbidden_code_character}somethingvalid"
-        expect(voucher).not_to be_valid
-        expect(voucher.errors[:code]).to eq(["is invalid"])
-      end
-    end
   end
 
   describe '#compute_amount' do