remove last bits of pre-38 codepath.

Closes  #13316

IPython/terminal/shortcuts.py

@@ -163,7 +163,6 b' def create_ipython_shortcuts(shell):'
         kb.add(*keys, filter=focused_insert & ebivim)(cmd)
 
     def get_input_mode(self):
-        if sys.version_info[0] == 3:
             app = get_app()
             app.ttimeoutlen = shell.ttimeoutlen
             app.timeoutlen = shell.timeoutlen

IPython/testing/decorators.py

@@ -162,11 +162,6 b' _x11_skip_msg = "Skipped under *nix when X11/XOrg not available"'
 
 skip_if_no_x11 = skipif(_x11_skip_cond, _x11_skip_msg)
 
-
-# Decorators to skip certain tests on specific platform/python combinations
-skip_win32_py38 = skipif(sys.version_info > (3,8) and os.name == 'nt')
-
-
 # Other skip decorators
 
 # generic skip without module

IPython/testing/tools.py

@@ -191,9 +191,6 b' def ipexec(fname, options=None, commands=()):'
     # Absolute path for filename
     full_fname = os.path.join(test_dir, fname)
     full_cmd = ipython_cmd + cmdargs + ['--', full_fname]
-    if sys.platform == "win32" and sys.version_info < (3, 8):
-        # subprocess.Popen does not support Path objects yet
-        full_cmd = list(map(str, full_cmd))
     env = os.environ.copy()
     # FIXME: ignore all warnings in ipexec while we have shims
     # should we keep suppressing warnings here, even after removing shims?

IPython/utils/tests/test_path.py

@@ -19,9 +19,11 b' import pytest'
 import IPython
 from IPython import paths
 from IPython.testing import decorators as dec
-from IPython.testing.decorators import (skip_if_not_win32, skip_win32,
+from IPython.testing.decorators import (
+    skip_if_not_win32,
+    skip_win32,
                                         onlyif_unicode_paths,
-                                        skip_win32_py38,)
+)
 from IPython.testing.tools import make_tempfile
 from IPython.utils import path
 from IPython.utils.tempdir import TemporaryDirectory
@@ -138,7 +140,7 b' def test_get_home_dir_2():'
     assert home_dir == unfrozen
 
 
-@skip_win32_py38
+@skip_win32
 @with_environment
 def test_get_home_dir_3():
     """get_home_dir() uses $HOME if set"""
@@ -156,7 +158,7 b' def test_get_home_dir_4():'
     # this should still succeed, but we don't care what the answer is
     home = path.get_home_dir(False)
 
-@skip_win32_py38
+@skip_win32
 @with_environment
 def test_get_home_dir_5():
     """raise HomeDirError if $HOME is specified, but not a writable dir"""