To be squashed: Duplicate post build scripts to not touch frozen files

Also remove post build operation support for MUSCA targets as TFM support
is not yet ready.

Author: hugueskamba

targets/TARGET_ARM_SSG/TARGET_MUSCA_B1/CMakeLists.txt

@@ -1,8 +1,6 @@
 # Copyright (c) 2020 ARM Limited. All rights reserved.
 # SPDX-License-Identifier: Apache-2.0
 
-include(${MBED_PATH}/targets/TARGET_ARM_SSG/scripts/mbed_set_post_build_arm_ssg.cmake)
-
 if(${MBED_TOOLCHAIN} STREQUAL "ARM")
     set(LINKER_FILE device/TOOLCHAIN_ARMC6/musca_ns.sct)
     set(STARTUP_FILE device/TOOLCHAIN_ARMC6/startup_cmsdk_musca_ns.S)
@@ -54,7 +52,3 @@ target_link_libraries(mbed-core
     INTERFACE
         ${CMAKE_CURRENT_SOURCE_DIR}/s_veneers.o
 )
-
-mbed_post_build_musca_b1_merge_secure_bin(
-    "${MBED_PATH}/targets/TARGET_ARM_SSG/TARGET_MUSCA_B1/tfm_s.bin"
-)

targets/TARGET_ARM_SSG/TARGET_MUSCA_S1/CMakeLists.txt

@@ -1,8 +1,6 @@
 # Copyright (c) 2020 ARM Limited. All rights reserved.
 # SPDX-License-Identifier: Apache-2.0
 
-include(${MBED_PATH}/targets/TARGET_ARM_SSG/scripts/mbed_set_post_build_arm_ssg.cmake)
-
 if(${MBED_TOOLCHAIN} STREQUAL "ARM")
     set(LINKER_FILE device/TOOLCHAIN_ARMC6/musca_ns.sct)
     set(STARTUP_FILE device/TOOLCHAIN_ARMC6/startup_cmsdk_musca_ns.S)
@@ -60,7 +58,3 @@ target_link_libraries(mbed-core
     INTERFACE
         ${CMAKE_CURRENT_SOURCE_DIR}/s_veneers.o
 )
-
-mbed_post_build_musca_s1_merge_secure_bin(
-    "${MBED_PATH}/targets/TARGET_ARM_SSG/TARGET_MUSCA_S1/tfm_s.bin"
-)