App: Minor fix of include header file

Refine the header files included in main_ns.c
 - tfm_integ_test.h is included in main_ns.c when NS or Secure test is
   enabled.
 - test_framework_integ_test.h is removed from main_ns.c.

Simplfy build system accordingly.

Signed-off-by: David Hu <david.hu@arm.com>
Change-Id: I7a4c09ee149aae1381c1730622f8ae4ab9bc1508
diff --git a/app/tfm_integ_test.h b/app/tfm_integ_test.h
index f65f4f1..f793ced 100644
--- a/app/tfm_integ_test.h
+++ b/app/tfm_integ_test.h
@@ -1,13 +1,10 @@
 /*
- * Copyright (c) 2017-2020, Arm Limited. All rights reserved.
+ * Copyright (c) 2017-2021, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
  */
 
-#include <stdio.h>
-#include "cmsis_compiler.h"
-
 #ifndef __TFM_INTEG_TEST_H__
 #define __TFM_INTEG_TEST_H__
 
@@ -15,11 +12,6 @@
 extern "C" {
 #endif
 
-/* Avoids the semihosting issue */
-#if defined (__ARMCC_VERSION) && (__ARMCC_VERSION >= 6010050)
-__asm("  .global __ARM_use_no_argv\n");
-#endif
-
 /**
  * \brief Simple macro to mark UNUSED variables
  *