Revert "Add support for AUTH, closes #62" (#206)

This reverts commit 261bbef426.  It was merged to directly master by mistake, and should have gone through the normal release process.

pkg/server/smtp/handler_test.go

@@ -108,46 +108,6 @@ func TestEmptyEnvelope(t *testing.T) {
 	}
 }
 
-// Test AUTH
-func TestAuth(t *testing.T) {
-	ds := test.NewStore()
-	server, logbuf, teardown := setupSMTPServer(ds)
-	defer teardown()
-
-	//PLAIN AUTH
-	script := []scriptStep{
-		{"EHLO localhost", 250},
-		{"AUTH PLAIN aW5idWNrZXQ6cGFzc3dvcmQK", 235},
-		{"RSET", 250},
-		{"AUTH GSSAPI aW5idWNrZXQ6cGFzc3dvcmQK", 500},
-		{"RSET", 250},
-		{"AUTH PLAIN", 500},
-		{"RSET", 250},
-		{"AUTH PLAIN aW5idWNrZXQ6cG Fzc3dvcmQK", 500},
-	}
-	if err := playSession(t, server, script); err != nil {
-		t.Error(err)
-	}
-
-	//LOGIN AUTH
-	script = []scriptStep{
-		{"EHLO localhost", 250},
-		{"AUTH LOGIN", 334},
-		{"USERNAME", 334},
-		{"PASSWORD", 235},
-	}
-	if err := playSession(t, server, script); err != nil {
-		t.Error(err)
-	}
-
-	if t.Failed() {
-		// Wait for handler to finish logging
-		time.Sleep(2 * time.Second)
-		// Dump buffered log data if there was a failure
-		_, _ = io.Copy(os.Stderr, logbuf)
-	}
-}
-
 // Test commands in READY state
 func TestReadyState(t *testing.T) {
 	ds := test.NewStore()