Remove separate growableHeap.js. NFC (#24922)

This file used to contain a lot more code than it does now.

Author: sbc100

eslint.config.mjs

@@ -52,7 +52,6 @@ export default [{
     'src/Fetch.js',
     'src/settings.js',
     'src/settings_internal.js',
-    'src/growableHeap.js',
     'src/emrun_prejs.js',
     'src/deterministic.js',
     'src/proxyWorker.js',

src/growableHeap.js

@@ -13,7 +13,14 @@
 #endif
 
 #if SHARED_MEMORY && ALLOW_MEMORY_GROWTH && !GROWABLE_ARRAYBUFFERS
-#include "growableHeap.js"
+// Support for growable heap + pthreads, where the buffer may change, so JS views
+// must be updated.
+function growMemViews() {
+  // `updateMemoryViews` updates all the views simultaneously, so it's enough to check any of them.
+  if (wasmMemory.buffer != HEAP8.buffer) {
+    updateMemoryViews();
+  }
+}
 #endif
 
 #if USE_ASAN