FIX: Remove automatic failover on boot.

Let the application decides what to do instead.

lib/rails_failover/active_record/railtie.rb

@@ -18,15 +18,6 @@ class Railtie < ::Rails::Railtie
               connection_pool.spec
             )
           end
-
-          begin
-            ::ActiveRecord::Base.connection
-          rescue ::ActiveRecord::NoDatabaseError
-            # Do nothing since database hasn't been created
-          rescue ::PG::Error => e
-            Handler.instance.verify_primary(::ActiveRecord::Base.writing_role)
-            ::ActiveRecord::Base.connection_handler = ::ActiveRecord::Base.lookup_connection_handler(:reading)
-          end
         end
       end