Remove deprecated Thread constructor usage

Author: bulislaw

TESTS/mbedmicro-rtos-mbed/mail/main.cpp

@@ -21,7 +21,7 @@ typedef struct {
 
 Mail<mail_t, QUEUE_SIZE> mail_box;
 
-void send_thread (void const *argument) {
+void send_thread () {
     static uint32_t i = 10;
     while (true) {
         i++; // fake data update
@@ -37,7 +37,8 @@ void send_thread (void const *argument) {
 int main (void) {
     GREENTEA_SETUP(20, "default_auto");
 
-    Thread thread(send_thread, NULL, osPriorityNormal, STACK_SIZE);
+    Thread thread(osPriorityNormal, STACK_SIZE);
+    thread.start(send_thread);
     bool result = true;
     int result_counter = 0;