src: remove unused perf_hooks uv handles

A couple of unused uv handles were accidentally left
in env.

PR-URL: nodejs/node#15368
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Brian White <mscdex@mscdex.net>

src/env-inl.h

@@ -529,33 +529,6 @@ inline std::map<std::string, uint64_t>* Environment::performance_marks() {
   return &performance_marks_;
 }
 
-inline Environment* Environment::from_performance_check_handle(
-    uv_check_t* handle) {
-  return ContainerOf(&Environment::performance_check_handle_, handle);
-}
-
-inline Environment* Environment::from_performance_idle_handle(
-    uv_idle_t* handle) {
-  return ContainerOf(&Environment::performance_idle_handle_, handle);
-}
-
-inline Environment* Environment::from_performance_prepare_handle(
-    uv_prepare_t* handle) {
-  return ContainerOf(&Environment::performance_prepare_handle_, handle);
-}
-
-inline uv_check_t* Environment::performance_check_handle() {
-  return &performance_check_handle_;
-}
-
-inline uv_idle_t* Environment::performance_idle_handle() {
-  return &performance_idle_handle_;
-}
-
-inline uv_prepare_t* Environment::performance_prepare_handle() {
-  return &performance_prepare_handle_;
-}
-
 inline IsolateData* Environment::isolate_data() const {
   return isolate_data_;
 }

src/env.h

@@ -617,14 +617,6 @@ class Environment {
   inline performance::performance_state* performance_state();
   inline std::map<std::string, uint64_t>* performance_marks();
 
-  static inline Environment* from_performance_check_handle(uv_check_t* handle);
-  static inline Environment* from_performance_idle_handle(uv_idle_t* handle);
-  static inline Environment* from_performance_prepare_handle(
-      uv_prepare_t* handle);
-  inline uv_check_t* performance_check_handle();
-  inline uv_idle_t* performance_idle_handle();
-  inline uv_prepare_t* performance_prepare_handle();
-
   inline void ThrowError(const char* errmsg);
   inline void ThrowTypeError(const char* errmsg);
   inline void ThrowRangeError(const char* errmsg);
@@ -704,9 +696,6 @@ class Environment {
   uv_timer_t destroy_ids_timer_handle_;
   uv_prepare_t idle_prepare_handle_;
   uv_check_t idle_check_handle_;
-  uv_prepare_t performance_prepare_handle_;
-  uv_check_t performance_check_handle_;
-  uv_idle_t performance_idle_handle_;
 
   AsyncHooks async_hooks_;
   DomainFlag domain_flag_;