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

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