Avoid generating redundant pthread worker.js file

tools/link.py

@@ -2073,15 +2073,6 @@ def phase_final_emitting(options, state, target, wasm_target):
     return
 
   target_dir = os.path.dirname(os.path.abspath(target))
-  if settings.PTHREADS and not settings.STRICT:
-    worker_file = shared.replace_suffix(target, get_worker_js_suffix())
-    write_file(worker_file, '''\
-// This file is no longer used by emscripten and has been created as a placeholder
-// to allow build systems to transition away from depending on it.
-//
-// Future versions of emscripten will likely stop generating this file at all.
-throw new Error('Dummy worker.js file should never be used');
-''')
 
   # Deploy the Wasm Worker bootstrap file as an output file (*.ww.js)
   if settings.WASM_WORKERS == 1: