Revert "[3.13] pythonGH-122298: Restore printing of GC stats (pythonGH-123261) (python#123268)"

This reverts commit b1372e2.

Author: Yhg1s

Python/gc.c

@@ -1289,7 +1289,6 @@ gc_collect_young(PyThreadState *tstate,
     GCState *gcstate = &tstate->interp->gc;
     PyGC_Head *young = &gcstate->young.head;
     PyGC_Head *visited = &gcstate->old[gcstate->visited_space].head;
-    GC_STAT_ADD(0, collections, 1);
 #ifdef Py_STATS
     {
         Py_ssize_t count = 0;
@@ -1418,7 +1417,6 @@ completed_cycle(GCState *gcstate)
 static void
 gc_collect_increment(PyThreadState *tstate, struct gc_collection_stats *stats)
 {
-    GC_STAT_ADD(1, collections, 1);
     GCState *gcstate = &tstate->interp->gc;
     PyGC_Head *not_visited = &gcstate->old[gcstate->visited_space^1].head;
     PyGC_Head *visited = &gcstate->old[gcstate->visited_space].head;
@@ -1464,7 +1462,6 @@ static void
 gc_collect_full(PyThreadState *tstate,
                 struct gc_collection_stats *stats)
 {
-    GC_STAT_ADD(2, collections, 1);
     GCState *gcstate = &tstate->interp->gc;
     validate_old(gcstate);
     PyGC_Head *young = &gcstate->young.head;
@@ -1787,24 +1784,6 @@ PyGC_IsEnabled(void)
     return gcstate->enabled;
 }
 
-// Show stats for objects in each generations
-static void
-show_stats_each_generations(GCState *gcstate)
-{
-    char buf[100];
-    size_t pos = 0;
-
-    for (int i = 0; i < NUM_GENERATIONS && pos < sizeof(buf); i++) {
-        pos += PyOS_snprintf(buf+pos, sizeof(buf)-pos,
-                             " %zd",
-                             gc_list_size(GEN_HEAD(gcstate, i)));
-    }
-    PySys_FormatStderr(
-        "gc: objects in each generation:%s\n"
-        "gc: objects in permanent generation: %zd\n",
-        buf, gc_list_size(&gcstate->permanent_generation.head));
-}
-
 Py_ssize_t
 _PyGC_Collect(PyThreadState *tstate, int generation, _PyGC_Reason reason)
 {
@@ -1820,10 +1799,6 @@ _PyGC_Collect(PyThreadState *tstate, int generation, _PyGC_Reason reason)
     if (reason != _Py_GC_REASON_SHUTDOWN) {
         invoke_gc_callback(gcstate, "start", generation, &stats);
     }
-    if (gcstate->debug & _PyGC_DEBUG_STATS) {
-        PySys_WriteStderr("gc: collecting generation %d...\n", generation);
-        show_stats_each_generations(gcstate);
-    }
     if (PyDTrace_GC_START_ENABLED()) {
         PyDTrace_GC_START(generation);
     }