nrf52_bsim: Remove no longer needed header stubs

These headers were here only because some drivers were
using them directly.
But they are not needed anymore, so remove them.

Signed-off-by: Alberto Escolar Piedras <alpi@oticon.com>

boards/posix/nrf52_bsim/CMakeLists.txt

@@ -16,10 +16,6 @@ endif()
 zephyr_library()
 zephyr_library_compile_definitions(NO_POSIX_CHEATS)
 
-zephyr_include_directories(
-  fake
-)
-
 #Due to the BLE controller assumption about enum size
 zephyr_compile_options(
   -fshort-enums
@@ -36,7 +32,6 @@ zephyr_library_sources(
 )
 
 zephyr_library_include_directories(
-  fake
   $ENV{BSIM_COMPONENTS_PATH}/libUtilv1/src/
   $ENV{BSIM_COMPONENTS_PATH}/libPhyComv1/src/
   $ENV{BSIM_COMPONENTS_PATH}/libRandv2/src/

boards/posix/nrf52_bsim/fake/core_cm4.h

@@ -1,21 +0,0 @@
-/*
- * Copyright (c) 2017 Oticon A/S
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * This header is a replacement for the real core_cm4.h
- * so these  defines, which are used in other files, exist
- */
-
-#ifndef CORE_CM4_H
-#define CORE_CM4_H
-
-#define  __I
-#define  __O
-#define  __IO
-
-#define  __IM
-#define  __OM
-#define  __IOM
-
-#endif

boards/posix/nrf52_bsim/fake/system_nrf52.h

@@ -1,4 +0,0 @@
-/*
- * This header is a empty on purpose. We need it as it is included from
- * other Zephyr files, but we do not need the content of the real one
- */