Remove thread profiler completely from non-pthreads builds. NFC

Split out from #26487

Author: sbc100

system/lib/pthread/threading_internal.h

@@ -69,7 +69,7 @@ void _emscripten_thread_exit_joinable(pthread_t thread);
 void _emscripten_thread_exit(void* result);
 void _emscripten_process_dlopen_queue(void);
 
-#ifdef NDEBUG
+#if !defined(__EMSCRIPTEN_PTHREADS__) || defined(NDEBUG)
 #define emscripten_set_current_thread_status(newStatus)
 #define emscripten_conditional_set_current_thread_status(expectedStatus, newStatus)
 #else

test/codesize/test_codesize_hello_dylink_all.json

@@ -1,7 +1,7 @@
 {
   "a.out.js": 244367,
-  "a.out.nodebug.wasm": 577323,
-  "total": 821690,
+  "a.out.nodebug.wasm": 577288,
+  "total": 821655,
   "sent": [
     "IMG_Init",
     "IMG_Load",
@@ -2243,7 +2243,6 @@
     "emscripten_proxy_sync",
     "emscripten_proxy_sync_with_ctx",
     "emscripten_scan_stack",
-    "emscripten_set_thread_name",
     "emscripten_stack_get_base",
     "emscripten_stack_get_current",
     "emscripten_stack_get_end",
@@ -4100,7 +4099,6 @@
     "$emscripten_proxy_async",
     "$emscripten_proxy_execute_queue",
     "$emscripten_scan_stack",
-    "$emscripten_set_thread_name",
     "$emscripten_stack_get_base",
     "$emscripten_stack_get_current",
     "$emscripten_stack_get_end",

tools/system_libs.py

@@ -1211,6 +1211,7 @@ def get_files(self):
           'pthread_kill.c',
           'emscripten_thread_init.c',
           'emscripten_yield.c',
+          'thread_profiler.c',
         ])
     else:
       ignore += ['thread']
@@ -1412,10 +1413,6 @@ def get_files(self):
     if settings.MAIN_MODULE:
       libc_files += files_in_path(path='system/lib/libc', filenames=['dynlink.c'])
 
-    libc_files += files_in_path(
-        path='system/lib/pthread',
-        filenames=['thread_profiler.c'])
-
     libc_files += glob_in_path('system/lib/libc/compat', '*.c')
 
     # Check for missing file in non_lto_files list.  Do this here