Remove shoulda-matchers gem

#206

spec/models/account_spec.rb

@@ -1,9 +1,6 @@
 require 'rails_helper'
 
 describe Account do
-  it { should belong_to(:registrar) }
-  it { should have_many(:account_activities) }
-
   context 'with invalid attribute' do
     before :all do
       @account = Account.new

spec/models/address_spec.rb

@@ -1,8 +1,6 @@
 require 'rails_helper'
 
 describe Address do
-  it { should belong_to(:contact) }
-
   context 'about class' do
     it 'should have versioning enabled?' do
       Address.paper_trail_enabled_for_model?.should == true

spec/models/api_user_spec.rb

@@ -1,8 +1,6 @@
 require 'rails_helper'
 
 describe ApiUser do
-  it { should belong_to(:registrar) }
-
   context 'class methods' do
     before do
       Fabricate(:api_user, identity_code: '')

spec/models/bank_statement_spec.rb

@@ -1,8 +1,6 @@
 require 'rails_helper'
 
 describe BankStatement do
-  it { should have_many(:bank_transactions) }
-
   context 'with invalid attribute' do
     before :all do
       @bank_statement = BankStatement.new

spec/models/bank_transaction_spec.rb

@@ -1,9 +1,6 @@
 require 'rails_helper'
 
 describe BankTransaction do
-  it { should belong_to(:bank_statement) }
-  it { should have_one(:account_activity) }
-
   context 'with invalid attribute' do
     before :all do
       @bank_transaction = BankTransaction.new

spec/models/certificate_spec.rb

@@ -1,8 +1,6 @@
 require 'rails_helper'
 
 describe Certificate do
-  it { should belong_to(:api_user) }
-
   context 'with invalid attribute' do
     before :all do
       @certificate = Certificate.new

spec/models/dnskey_spec.rb

@@ -5,8 +5,6 @@ describe Dnskey do
     Fabricate(:zonefile_setting, origin: 'ee')
   end
 
-  it { should belong_to(:domain) }
-
   context 'with invalid attribute' do
     before :all do
       @dnskey = Dnskey.new

spec/models/domain_spec.rb

@@ -9,15 +9,6 @@ describe Domain do
     Fabricate(:zonefile_setting, origin: 'com.ee')
   end
 
-  it { should belong_to(:registrar) }
-  it { should have_many(:nameservers) }
-  it { should belong_to(:registrant) }
-  it { should have_many(:tech_contacts) }
-  it { should have_many(:admin_contacts) }
-  it { should have_many(:domain_transfers) }
-  it { should have_many(:dnskeys) }
-  it { should have_many(:legal_documents) }
-
   context 'with invalid attribute' do
     before :all do
       @domain = Domain.new

spec/models/domain_transfer_spec.rb

@@ -5,8 +5,6 @@ describe DomainTransfer do
     Fabricate(:zonefile_setting, origin: 'ee')
   end
 
-  it { should belong_to(:domain) }
-
   context 'with invalid attribute' do
     before :all do
       @domain_transfer = DomainTransfer.new

spec/models/invoice_spec.rb

@@ -1,10 +1,6 @@
 require 'rails_helper'
 
 describe Invoice do
-  it { should belong_to(:seller) }
-  it { should belong_to(:buyer) }
-  it { should have_many(:invoice_items) }
-
   context 'with invalid attribute' do
     before :all do
       @invoice = Invoice.new

spec/models/keyrelay_spec.rb

@@ -5,11 +5,6 @@ describe Keyrelay do
     Fabricate(:zonefile_setting, origin: 'ee')
   end
 
-  it { should belong_to(:domain) }
-  it { should belong_to(:requester) }
-  it { should belong_to(:accepter) }
-  it { should have_many(:legal_documents) }
-
   context 'with invalid attribute' do
     before :all do
       @keyrelay = Keyrelay.new

spec/models/message_spec.rb

@@ -1,8 +1,6 @@
 require 'rails_helper'
 
 describe Message do
-  it { should belong_to(:registrar) }
-
   context 'with invalid attribute' do
     before :all do
       @mssage = Message.new

spec/models/nameserver_spec.rb

@@ -5,8 +5,6 @@ describe Nameserver do
     Fabricate(:zonefile_setting, origin: 'ee')
   end
 
-  it { should belong_to(:domain) }
-
   context 'with invalid attribute' do
     before :all do
       @nameserver = Nameserver.new

spec/models/registrar_spec.rb

@@ -1,11 +1,6 @@
 require 'rails_helper'
 
 describe Registrar do
-  it { should have_many(:domains) }
-  it { should have_many(:api_users) }
-  it { should have_many(:messages) }
-  it { should have_many(:white_ips) }
-
   context 'with invalid attribute' do
     before :all do
       @registrar = Registrar.new

spec/models/white_ip_spec.rb

@@ -1,8 +1,6 @@
 require 'rails_helper'
 
 describe WhiteIp do
-  it { should belong_to(:registrar) }
-
   context 'with invalid attribute' do
     before :all do
       @white_ip = WhiteIp.new