[3.12] gh-116860: Remove outdated test_parserhack from test_future (GH-116861) (#119648)

gh-116860: Remove outdated `test_parserhack` from `test_future` (GH-116861)
(cherry picked from commit 669175b)

Co-authored-by: Nikita Sobolev <mail@sobolevn.me>

Author: miss-islington

Lib/test/test_future_stmt/test_future.py

@@ -107,26 +107,6 @@ def test_ensure_flags_dont_clash(self):
         }
         self.assertCountEqual(set(flags.values()), flags.values())
 
-    def test_parserhack(self):
-        # test that the parser.c::future_hack function works as expected
-        # Note: although this test must pass, it's not testing the original
-        #       bug as of 2.6 since the with statement is not optional and
-        #       the parser hack disabled. If a new keyword is introduced in
-        #       2.6, change this to refer to the new future import.
-        try:
-            exec("from __future__ import print_function; print 0")
-        except SyntaxError:
-            pass
-        else:
-            self.fail("syntax error didn't occur")
-
-        try:
-            exec("from __future__ import (print_function); print 0")
-        except SyntaxError:
-            pass
-        else:
-            self.fail("syntax error didn't occur")
-
     def test_unicode_literals_exec(self):
         scope = {}
         exec("from __future__ import unicode_literals; x = ''", {}, scope)