Remove a lot of test references to Python 2/3.5

test/completion/arrays.py

@@ -272,9 +272,6 @@ dic = {str(key): ''}
 #? str()
 dic['']
 
-# Just skip Python 2 tests from here. EoL soon, I'm too lazy for it.
-# python > 2.7
-
 
 for x in {1: 3.0, '': 1j}:
     #? int() str()
@@ -473,7 +470,6 @@ def test_func():
 #? int()
 tuple({1})[0]
 
-# python > 2.7
 # -----------------
 # PEP 3132 Extended Iterable Unpacking (star unpacking)
 # -----------------