bpo-40939: Remove some extra references to PYTHONOLDPARSER (GH-20815)



Automerge-Triggered-By: @pablogsal
diff --git a/Programs/_testembed.c b/Programs/_testembed.c
index 6f38b62..b60d70b 100644
--- a/Programs/_testembed.c
+++ b/Programs/_testembed.c
@@ -485,8 +485,6 @@
 
     config.install_signal_handlers = 0;
 
-    putenv("PYTHONOLDPARSER=1");
-
     /* FIXME: test use_environment */
 
     putenv("PYTHONHASHSEED=42");
@@ -673,7 +671,6 @@
     putenv("PYTHONNOUSERSITE=1");
     putenv("PYTHONFAULTHANDLER=1");
     putenv("PYTHONIOENCODING=iso8859-1:replace");
-    putenv("PYTHONOLDPARSER=1");
     putenv("PYTHONPLATLIBDIR=env_platlibdir");
 }
 
diff --git a/Tools/scripts/run_tests.py b/Tools/scripts/run_tests.py
index bcfa5e9..48feb3f 100644
--- a/Tools/scripts/run_tests.py
+++ b/Tools/scripts/run_tests.py
@@ -25,9 +25,8 @@
             '-u',                 # Unbuffered stdout and stderr
             '-W', 'default',      # Warnings set to 'default'
             '-bb',                # Warnings about bytes/bytearray
+            '-E',                 # Ignore environment variables
             ]
-    if 'PYTHONOLDPARSER' not in os.environ:
-        args.append('-E')         # Ignore environment variables
 
     # Allow user-specified interpreter options to override our defaults.
     args.extend(test.support.args_from_interpreter_flags())