bpo-40514: Drop EXPERIMENTAL_ISOLATED_SUBINTERPRETERS (gh-93185)

This was added for bpo-40514 (gh-84694) to test out a per-interpreter GIL. However, it has since proven unnecessary to keep the experiment in the repo. (It can be done as a branch in a fork like normal.) So here we are removing:

* the configure option
* the macro
* the code enabled by the macro

1 files changed, 0 insertions, 17 deletions

diff --git a/Python/pystate.c b/Python/pystate.c
index 3e28a6ab69..df56c0530f 100644
--- a/Python/pystate.c
+++ b/Python/pystate.c
@@ -1165,14 +1165,6 @@ _PyThreadState_DeleteExcept(_PyRuntimeState *runtime, PyThreadState *tstate)
 }
 
 
-#ifdef EXPERIMENTAL_ISOLATED_SUBINTERPRETERS
-PyThreadState*
-_PyThreadState_GetTSS(void) {
-    return PyThread_tss_get(&_PyRuntime.gilstate.autoTSSkey);
-}
-#endif
-
-
 PyThreadState *
 _PyThreadState_UncheckedGet(void)
 {
@@ -1192,11 +1184,7 @@ PyThreadState_Get(void)
 PyThreadState *
 _PyThreadState_Swap(struct _gilstate_runtime_state *gilstate, PyThreadState *newts)
 {
-#ifdef EXPERIMENTAL_ISOLATED_SUBINTERPRETERS
-    PyThreadState *oldts = _PyThreadState_GetTSS();
-#else
     PyThreadState *oldts = _PyRuntimeGILState_GetThreadState(gilstate);
-#endif
 
     _PyRuntimeGILState_SetThreadState(gilstate, newts);
     /* It should not be possible for more than one thread state
@@ -1215,9 +1203,6 @@ _PyThreadState_Swap(struct _gilstate_runtime_state *gilstate, PyThreadState *new
         errno = err;
     }
 #endif
-#ifdef EXPERIMENTAL_ISOLATED_SUBINTERPRETERS
-    PyThread_tss_set(&gilstate->autoTSSkey, newts);
-#endif
     return oldts;
 }
 
@@ -1665,9 +1650,7 @@ PyGILState_Ensure(void)
 
     /* Ensure that _PyEval_InitThreads() and _PyGILState_Init() have been
        called by Py_Initialize() */
-#ifndef EXPERIMENTAL_ISOLATED_SUBINTERPRETERS
     assert(_PyEval_ThreadsInitialized(runtime));
-#endif
     assert(gilstate->autoInterpreterState);
 
     PyThreadState *tcur = (PyThreadState *)PyThread_tss_get(&gilstate->autoTSSkey);