disable diag shell for tests

Summary: as titled

Reviewed By: srikrishnagopu

Differential Revision:
D66740333

Privacy Context Container: L1125642

fbshipit-source-id: 0a32c7f1b2f0dc5040411c418a4ec6b1e271b532

fboss/agent/hw/sai/hw_test/SaiSwitchEnsemble.cpp

@@ -180,8 +180,11 @@ void SaiSwitchEnsemble::init(
       getPlatform()->getAsic()->getDefaultStreamType());
   getPlatform()->initLEDs();
   auto hw = static_cast<SaiSwitch*>(getHwSwitch());
+#if !defined(CHENAB_SDK)
+  // TODO(pshaikh): hacking to skip this for Chenab for now
   diagShell_ = std::make_unique<DiagShell>(hw);
   diagCmdServer_ = std::make_unique<DiagCmdServer>(hw, diagShell_.get());
+#endif
 }
 
 void SaiSwitchEnsemble::gracefulExit() {