removing nl_unit infra from mbed

Author: Alami-Amine

src/test_driver/mbed/unit_tests/main/main.cpp

@@ -17,7 +17,6 @@
  */
 
 #include "netsocket/WiFiInterface.h"
-#include <lib/support/UnitTestRegistration.h>
 #include <lib/support/logging/CHIPLogging.h>
 #include <platform/mbed/Logging.h>
 
@@ -63,8 +62,11 @@ int main()
 
     ChipLogProgress(NotSpecified, "Mbed unit-tests application run");
 
-    int status = RunRegisteredUnitTests();
-    ChipLogProgress(NotSpecified, "CHIP test status: %d", status);
+    int status = 0;
+    // Migration to pw_unit_tests was not done for mbed since the unit-testing FW used to run out of flash and was disabled from
+    // GitHub Actions workflows: https://github.com/project-chip/connectedhomeip/pull/15966
+    // status += RunRegisteredUnitTests();
+    // ChipLogProgress(NotSpecified, "CHIP test status: %d", status);
 
     return status;
 }