Remove redundant check in preMain. NFC (#23485)

sbc100 · web-flow · commit fd52f0a0b6a2 · 2025-01-24T11:03:38.000-08:00
`preMain` is only called from `run()` which already has an early return
for this case.
diff --git a/src/preamble.js b/src/preamble.js
@@ -225,9 +225,6 @@ function initRuntime() {
 function preMain() {
 #if STACK_OVERFLOW_CHECK
   checkStackCookie();
-#endif
-#if PTHREADS
-  if (ENVIRONMENT_IS_PTHREAD) return; // PThreads reuse the runtime from the main thread.
 #endif
   <<< ATMAINS >>>
   callRuntimeCallbacks(__ATMAIN__);
diff --git a/test/other/codesize/test_codesize_minimal_pthreads.gzsize b/test/other/codesize/test_codesize_minimal_pthreads.gzsize
@@ -1 +1 @@
-4186
+4184
diff --git a/test/other/codesize/test_codesize_minimal_pthreads.jssize b/test/other/codesize/test_codesize_minimal_pthreads.jssize
@@ -1 +1 @@
-8728
+8725
