Removed the comment

Author: dominus97

libraries/rtos/rtx/TARGET_CORTEX_M/RTX_CM_lib.h

@@ -299,7 +299,7 @@ osThreadDef_t os_thread_def_main = {(os_pthread)main, osPriorityNormal, 0, NULL}
 #define INITIAL_SP            (0x20010000UL)
 
 #elif defined(TARGET_STM32F303RE)
-#define INITIAL_SP            (0x20010000UL)  //Not sure if right address, but it works!
+#define INITIAL_SP            (0x20010000UL)
 
 #else
 #error "no target defined"