Drop reply_key, skipped and skipped_reason from email_logs.

spec/jobs/clean_up_email_logs_spec.rb

@@ -11,7 +11,7 @@ describe Jobs::CleanUpEmailLogs do
     Fabricate(:skipped_email_log)
   end
 
-  it "removes old email logs without a reply_key" do
+  it "removes old email logs" do
     Jobs::CleanUpEmailLogs.new.execute({})
     expect(EmailLog.count).to eq(2)
     expect(SkippedEmailLog.count).to eq(1)

spec/jobs/user_email_spec.rb

@@ -45,7 +45,6 @@ describe Jobs::UserEmail do
 
       email_log = EmailLog.where(user_id: user.id).last
       expect(email_log.email_type).to eq("signup")
-      expect(email_log.skipped).to eq(false)
     end
 
   end