Revert "simplicity_sdk: Patch platform/security OS abstraction"

This reverts commit aea6e18.

Signed-off-by: Aksel Skauge Mellbye <[email protected]>

Author: asmellby

simplicity_sdk/platform/security/sl_component/sli_psec_osal/inc/sli_psec_osal.h

@@ -42,10 +42,7 @@
   #include "sl_component_catalog.h"
 #endif
 
-#if defined(__ZEPHYR__) && defined(SL_SE_MANAGER_THREADING)
-  #include "sli_psec_osal_zephyr.h"
-  #define SLI_PSEC_THREADING
-#elif defined(SL_CATALOG_MICRIUMOS_KERNEL_PRESENT) || defined(SL_CATALOG_FREERTOS_KERNEL_PRESENT)
+#if defined(SL_CATALOG_MICRIUMOS_KERNEL_PRESENT) || defined(SL_CATALOG_FREERTOS_KERNEL_PRESENT)
 // Include CMSIS RTOS2 kernel abstraction layer:
   #include "sli_psec_osal_cmsis_rtos2.h"
   #define SLI_PSEC_THREADING