moves verification group specs

spec/support/verifiable.rb

@@ -1,5 +1,3 @@
-require 'rails_helper'
-
 shared_examples_for "verifiable" do
   let(:model) { described_class }
 
@@ -161,4 +159,4 @@ shared_examples_for "verifiable" do
       expect(user.verification_letter_sent?).to eq(false)
     end
   end
-end
+end