LibJS: Remove the VERIFY_NOT_REACHED in link_and_eval_module

Since the spec does not fully define the entry points of modules what
this means is kind of unclear. But it does work in most cases and can
be useful. We do print out a warning just to clarify why there could be
strange things.

Userland/Libraries/LibJS/Runtime/VM.cpp

@@ -766,10 +766,9 @@ ThrowCompletionOr<void> VM::link_and_eval_module(Module& module)
 
     if (module_or_end.is_end()) {
         dbgln_if(JS_MODULE_DEBUG, "[JS MODULE] Warning introducing module via link_and_eval_module {}", module.filename());
-        if (m_loaded_modules.size() > 0) {
-            dbgln("Using link_and_eval module as entry point is not allowed if it is not the first module!");
-            VERIFY_NOT_REACHED();
-        }
+        if (m_loaded_modules.size() > 0)
+            dbgln("Warning: Using multiple modules as entry point can lead to unexpected results");
+
         m_loaded_modules.empend(
             &module,
             module.filename(),