n-api: take n-api out of experimental

Take n-api out of experimental as per:
nodejs/TSC#501

Backport-PR-URL: #19447
PR-URL: #19262
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Franziska Hinkelmann <franziska.hinkelmann@gmail.com>

src/env-inl.h

@@ -223,7 +223,6 @@ inline Environment::Environment(v8::Local<v8::Context> context,
       using_domains_(false),
       printed_error_(false),
       trace_sync_io_(false),
-      emit_napi_warning_(true),
       makecallback_cntr_(0),
       async_wrap_uid_(0),
       debugger_agent_(this),

src/env.cc

@@ -61,10 +61,4 @@ void Environment::PrintSyncTrace() const {
   fflush(stderr);
 }
 
-bool Environment::EmitNapiWarning() {
-  bool current_value = emit_napi_warning_;
-  emit_napi_warning_ = false;
-  return current_value;
-}
-
 }  // namespace node

src/env.h

@@ -537,8 +537,6 @@ class Environment {
 
   static const int kContextEmbedderDataIndex = NODE_CONTEXT_EMBEDDER_DATA_INDEX;
 
-  bool EmitNapiWarning();
-
  private:
   inline void ThrowError(v8::Local<v8::Value> (*fun)(v8::Local<v8::String>),
                          const char* errmsg);
@@ -570,7 +568,6 @@ class Environment {
   bool using_domains_;
   bool printed_error_;
   bool trace_sync_io_;
-  bool emit_napi_warning_;
   size_t makecallback_cntr_;
   int64_t async_wrap_uid_;
   std::vector<int64_t> destroy_ids_list_;

src/node.cc

@@ -2500,12 +2500,9 @@ void DLOpen(const FunctionCallbackInfo<Value>& args) {
     env->ThrowError("Module did not self-register.");
     return;
   }
-  if (mp->nm_version == -1) {
-    if (env->EmitNapiWarning()) {
-      ProcessEmitWarning(env, "N-API is an experimental feature and could "
-                         "change at any time.");
-    }
-  } else if (mp->nm_version != NODE_MODULE_VERSION) {
+
+  // -1 is used for N-API modules
+  if ((mp->nm_version != -1) && (mp->nm_version != NODE_MODULE_VERSION)) {
     char errmsg[1024];
     snprintf(errmsg,
              sizeof(errmsg),

src/node_api.cc

@@ -1,13 +1,3 @@
-/******************************************************************************
- * Experimental prototype for demonstrating VM agnostic and ABI stable API
- * for native modules to use instead of using Nan and V8 APIs directly.
- *
- * The current status is "Experimental" and should not be used for
- * production applications.  The API is still subject to change
- * and as an experimental feature is NOT subject to semver.
- *
- ******************************************************************************/
-
 #include <node_buffer.h>
 #include <node_object_wrap.h>
 #include <limits.h>  // INT_MAX

src/node_api.h

@@ -1,12 +1,3 @@
-/******************************************************************************
- * Experimental prototype for demonstrating VM agnostic and ABI stable API
- * for native modules to use instead of using Nan and V8 APIs directly.
- *
- * The current status is "Experimental" and should not be used for
- * production applications.  The API is still subject to change
- * and as an experimental feature is NOT subject to semver.
- *
- ******************************************************************************/
 #ifndef SRC_NODE_API_H_
 #define SRC_NODE_API_H_