Remove internal RTX includes

Alexander Zilberkant · Oren Cohen · commit 4a391d329797 · 2018-11-27T09:16:42.000+02:00
diff --git a/components/TARGET_PSA/spm/COMPONENT_SPM_MAILBOX/COMPONENT_NSPE/spm_client_proxy.c b/components/TARGET_PSA/spm/COMPONENT_SPM_MAILBOX/COMPONENT_NSPE/spm_client_proxy.c
@@ -26,7 +26,6 @@
 #include "spm_messages.h"
 #include "mbed_assert.h"
 #include "cmsis_os2.h"
-#include "rtx_lib.h"
 
 
 // Globals
