Test unit ready is a nop and not defined

src/BlueSCSI.cpp

@@ -117,7 +117,6 @@ SCSI_COMMAND_HANDLER(onModeSelect);
 SCSI_COMMAND_HANDLER(onVerify);
 SCSI_COMMAND_HANDLER(onReadBuffer);
 SCSI_COMMAND_HANDLER(onWriteBuffer);
-SCSI_COMMAND_HANDLER(onTestUnitReady);
 SCSI_COMMAND_HANDLER(onReZeroUnit);
 SCSI_COMMAND_HANDLER(onSendDiagnostic);
 SCSI_COMMAND_HANDLER(onReadDefectData);