tests: Remove print('flush') from 2 tests, since stmhal now works.

Fixing the USB problem on stmhal now gets these 2 tests working.

tests/basics/fun-callstar.py

@@ -31,5 +31,3 @@ a.foo(1, 2, *[100])
 
 # Iterator
 a.foo(*range(3))
-
-print('flush') # so that it works on pyboard...

tests/basics/fun-defargs.py

@@ -18,5 +18,3 @@ try:
     fun2(1, 2, 3, 4)
 except TypeError:
     print("TypeError")
-
-print('flush') # so that it works on pyboard...