Remove logic for SSLContext warning on old versions of Python.

tests/lib/__init__.py

@@ -462,12 +462,6 @@ class PipTestEnvironment(TestFileEnvironment):
     def pip(self, *args, **kwargs):
         if self.pip_expect_warning:
             kwargs['allow_stderr_warning'] = True
-        # On old versions of Python, urllib3/requests will raise a warning
-        # about the lack of an SSLContext. Expect it when running commands
-        # that will touch the outside world.
-        if (pyversion_tuple < (2, 7, 9) and
-                args and args[0] in ('search', 'install', 'download')):
-            kwargs['expect_stderr'] = True
         if kwargs.pop('use_module', True):
             exe = 'python'
             args = ('-m', 'pip') + args