STM32F0: clean main-thread-stack-size setting

Author: jeromecoutant

rtos/source/TARGET_CORTEX/mbed_lib.json

@@ -38,6 +38,12 @@
         "STM32L1": {
             "idle-thread-stack-size-debug-extra": 512
         },
+        "STM32F070RB": {
+            "main-thread-stack-size": 3072
+        },
+        "STM32F072RB": {
+            "main-thread-stack-size": 3072
+        },
         "MCU_NRF51": {
             "target.boot-stack-size": "0x800"
         },

targets/TARGET_STM/mbed_rtx.h

@@ -19,13 +19,6 @@
 
 #include <stdint.h>
 
-#if (defined(TARGET_STM32F070RB) || defined(TARGET_STM32F072RB))
-#ifdef MBED_CONF_RTOS_MAIN_THREAD_STACK_SIZE
-#undef MBED_CONF_RTOS_MAIN_THREAD_STACK_SIZE
-#endif
-#define MBED_CONF_RTOS_MAIN_THREAD_STACK_SIZE 3072
-#endif
-
 #if (defined(TARGET_STM32L475VG) || defined(TARGET_STM32L443RC))
 #if defined(__ARMCC_VERSION)
 extern uint32_t               Image$$ARM_LIB_HEAP$$ZI$$Base[];