Remove reference to old __wasm_nullptr function (#1928)

Author: sbc100

src/wasm/wasm-emscripten.cpp

@@ -36,8 +36,7 @@ cashew::IString EM_JS_PREFIX("__em_js__");
 static Name STACK_SAVE("stackSave"),
             STACK_RESTORE("stackRestore"),
             STACK_ALLOC("stackAlloc"),
-            STACK_INIT("stack$init"),
-            DUMMY_FUNC("__wasm_nullptr");
+            STACK_INIT("stack$init");
 
 void addExportedFunction(Module& wasm, Function* function) {
   wasm.addFunction(function);
@@ -181,9 +180,6 @@ void EmscriptenGlueGenerator::generateDynCallThunks() {
     tableSegmentData = wasm.table.segments[0].data;
   }
   for (const auto& indirectFunc : tableSegmentData) {
-    if (indirectFunc == DUMMY_FUNC) {
-      continue;
-    }
     std::string sig = getSig(wasm.getFunction(indirectFunc));
     auto* funcType = ensureFunctionType(sig, &wasm);
     if (!sigs.insert(sig).second) continue; // Sig is already in the set