Remove unused patch

0001-Run-the-tests-using-the-current-Python-executable.patch

@@ -1,39 +0,0 @@
-From 1f49677868a60ed697b0eafb2fb56471233b4ea5 Mon Sep 17 00:00:00 2001
-From: "Michael R. Crusoe" <1330696+mr-c@users.noreply.github.com>
-Date: Thu, 14 Feb 2019 12:25:27 +0200
-Subject: [PATCH] Run the tests using the current Python executable (#615)
-
-Not whatever "python" might be.
----
- typing_extensions/src_py2/test_typing_extensions.py | 3 ++-
- typing_extensions/src_py3/test_typing_extensions.py | 3 ++-
- 2 files changed, 4 insertions(+), 2 deletions(-)
-
-diff --git a/typing_extensions/src_py2/test_typing_extensions.py b/typing_extensions/src_py2/test_typing_extensions.py
-index eb5acf3..922d8cd 100644
---- a/typing_extensions/src_py2/test_typing_extensions.py
-+++ b/typing_extensions/src_py2/test_typing_extensions.py
-@@ -860,7 +860,8 @@ def test_typing_extensions_compiles_with_opt(self):
-         file_path = os.path.join(os.path.dirname(os.path.realpath(__file__)),
-                                  'typing_extensions.py')
-         try:
--            subprocess.check_output('python -OO {}'.format(file_path),
-+            subprocess.check_output('{} -OO {}'.format(sys.executable,
-+                                                       file_path),
-                                     stderr=subprocess.STDOUT,
-                                     shell=True)
-         except subprocess.CalledProcessError:
-diff --git a/typing_extensions/src_py3/test_typing_extensions.py b/typing_extensions/src_py3/test_typing_extensions.py
-index eb0c64f..815e425 100644
---- a/typing_extensions/src_py3/test_typing_extensions.py
-+++ b/typing_extensions/src_py3/test_typing_extensions.py
-@@ -1389,7 +1389,8 @@ def test_typing_extensions_compiles_with_opt(self):
-         file_path = os.path.join(os.path.dirname(os.path.realpath(__file__)),
-                                  'typing_extensions.py')
-         try:
--            subprocess.check_output('python -OO {}'.format(file_path),
-+            subprocess.check_output('{} -OO {}'.format(sys.executable,
-+                                                       file_path),
-                                     stderr=subprocess.STDOUT,
-                                     shell=True)
-         except subprocess.CalledProcessError: