fixup! perf_hooks: complete overhaul of the implementation

Author: jasnell

lib/internal/perf/event_loop_delay.js

@@ -1,7 +1,6 @@
 'use strict';
 
 const {
-  NumberIsSafeInteger
 } = primordials;
 
 const {
@@ -10,16 +9,9 @@ const {
 
 const {
   validateInteger,
-  validateNumber,
   validateObject,
 } = require('internal/validators');
 
-const {
-  codes: {
-    ERR_INVALID_ARG_VALUE,
-  },
-} = require('internal/errors');
-
 const {
   Histogram,
   kHandle,