Remove rubocop todo for EmptyLineAfterFinalLet

Ran: bundle exec rubocop --only RSpec/EmptyLineAfterFinalLet -a

.rubocop_todo.yml

@@ -268,11 +268,6 @@ Naming/RescuedExceptionsVariableName:
 RSpec/ContextWording:
   Enabled: false
 
-# Offense count: 407
-# Cop supports --auto-correct.
-RSpec/EmptyLineAfterFinalLet:
-  Enabled: false
-
 # Offense count: 719
 # Cop supports --auto-correct.
 # Configuration parameters: EnforcedStyle.

spec/features/dashboard/snippets_spec.rb

@@ -91,6 +91,7 @@ describe 'Dashboard snippets' do
 
   context 'as an external user' do
     let(:user) { create(:user, :external) }
+
     before do
       sign_in(user)
       visit dashboard_snippets_path

spec/models/blob_spec.rb

@@ -424,6 +424,7 @@ describe Blob do
 
   describe 'policy' do
     let(:project) { build(:project) }
+
     subject { described_class.new(fake_blob(path: 'foo'), project) }
 
     it 'works with policy' do

spec/models/readme_blob_spec.rb

@@ -7,6 +7,7 @@ describe ReadmeBlob do
 
   describe 'policy' do
     let(:project) { build(:project, :repository) }
+
     subject { described_class.new(fake_blob(path: 'README.md'), project.repository) }
 
     it 'works with policy' do