[3.9] bpo-40514: Remove --with-experimental-isolated-subinterpreters in 3.9 (GH-20228)
Remove --with-experimental-isolated-subinterpreters configure option
in Python 3.9: the experiment continues in the master branch, but
it's no longer needed in 3.9.
diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index ea46a44..1082eb4 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -198,10 +198,7 @@
# define OVERALLOCATE_FACTOR 4
#endif
-/* bpo-40521: Interned strings are shared by all interpreters. */
-#ifndef EXPERIMENTAL_ISOLATED_SUBINTERPRETERS
-# define INTERNED_STRINGS
-#endif
+#define INTERNED_STRINGS
/* This dictionary holds all interned unicode strings. Note that references
to strings in this dictionary are *not* counted in the string's ob_refcnt.
@@ -288,10 +285,7 @@
/* List of static strings. */
static _Py_Identifier *static_strings = NULL;
-/* bpo-40521: Latin1 singletons are shared by all interpreters. */
-#ifndef EXPERIMENTAL_ISOLATED_SUBINTERPRETERS
-# define LATIN1_SINGLETONS
-#endif
+#define LATIN1_SINGLETONS
#ifdef LATIN1_SINGLETONS
/* Single character Unicode strings in the Latin-1 range are being