--- libmalloc/libmalloc-474.0.13/tests/add_xzone_tests.py
+++ /dev/null
@@ -1,69 +0,0 @@
-#!/usr/bin/env python3
-
-import copy
-import plistlib
-import sys
-
-def add_xzone_tests(bats_plist_path):
-    with open(bats_plist_path, 'rb') as bats_plist_file:
-        orig_bats_plist = plistlib.load(bats_plist_file)
-
-    # Copy all the top-level keys as-is except for the Tests list
-    new_bats_plist = { k: v for k, v in orig_bats_plist.items() if k != 'Tests' }
-
-    tests = []
-    for test in orig_bats_plist['Tests']:
-        # Take the original test exactly as it was, unless it's xzone-only
-        if 'Tags' not in test or 'xzone_only' not in test['Tags']:
-            tests.append(test)
-
-        if 'Tags' in test and ('xzone' in test['Tags'] or 'xzone_only' in test['Tags']):
-            # This test has been tagged to run with xzone malloc
-            xzone_test = copy.deepcopy(test)
-
-            if 'TestName' in xzone_test:
-                orig_name = xzone_test['TestName']
-                xzone_test['TestName'] = orig_name + '.xzone'
-
-            if 'CanonicalName' in xzone_test:
-                # The CanonicalName for darwintests has a .<arch> suffix that we
-                # want to keep at the end, so insert our new component just
-                # before that
-                orig_name = xzone_test['CanonicalName']
-                components = orig_name.split('.')
-                if len(components) > 1:
-                    components.insert(-1, 'xzone')
-                    new_name = '.'.join(components)
-                else:
-                    new_name = orig_name + '.xzone'
-
-                xzone_test['CanonicalName'] = new_name
-
-            envvars = ['MallocSecureAllocator=1']
-            if 'perf' not in xzone_test['Tags']:
-                # This isn't a performance test, so we can use the debug variant
-                # of the library for extra assert coverage
-                envvars.append('DYLD_LIBRARY_PATH=/AppleInternal/Tests/libmalloc/assets')
-                envvars.append('DYLD_IMAGE_SUFFIX=_testdebug')
-
-                # However, using the debug variant does prevent leaks from
-                # working, so don't bother trying
-                envvars.append('DT_BYPASS_LEAKS_CHECK=1')
-
-            if 'ShellEnv' in xzone_test:
-                xzone_test['ShellEnv'].extend(envvars)
-            else:
-                xzone_test['ShellEnv'] = envvars
-
-            tests.append(xzone_test)
-
-    new_bats_plist['Tests'] = tests
-
-    with open(bats_plist_path, 'wb') as bats_plist_file:
-        plistlib.dump(new_bats_plist, bats_plist_file, fmt=plistlib.FMT_BINARY)
-
-if __name__ == '__main__':
-    if len(sys.argv) != 2:
-        sys.exit('Expected bats plist as argument')
-
-    add_xzone_tests(sys.argv[1])