Remove some Python 3.5/3.4 references

test/test_diff_parser.py

@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 from textwrap import dedent
 import logging
-import sys
 
 import pytest
 
@@ -1267,7 +1266,6 @@ def test_some_weird_removals(differ):
     differ.parse(code1, copies=1)
 
 
-@pytest.mark.skipif(sys.version_info < (3, 5), reason="Async starts working in 3.5")
 def test_async_copy(differ):
     code1 = dedent('''\
         async def main():

test/test_python_errors.py

@@ -123,10 +123,6 @@ def _get_actual_exception(code):
     elif wanted == 'SyntaxError: assignment to keyword':
         return [wanted, "SyntaxError: can't assign to keyword",
                 'SyntaxError: cannot assign to __debug__'], line_nr
-    elif wanted == 'SyntaxError: can use starred expression only as assignment target':
-        # Python 3.4/3.4 have a bit of a different warning than 3.5/3.6 in
-        # certain places. But in others this error makes sense.
-        return [wanted, "SyntaxError: can't use starred expression here"], line_nr
     elif wanted == 'SyntaxError: f-string: unterminated string':
         wanted = 'SyntaxError: EOL while scanning string literal'
     elif wanted == 'SyntaxError: f-string expression part cannot include a backslash':