test: remove common.hasTracing

`common.hasTracing` is only used in one place. `common` is bloated so
let's move that to the one test that uses it.

`hasTracing` is undocumented so there's no need to remove it from the
README file as it's not there in the first place.

Similarly, it's not included in the .mjs version of the `common` file.

test/common/index.js

@@ -29,7 +29,6 @@ const os = require('os');
 const { exec, execSync, spawn, spawnSync } = require('child_process');
 const stream = require('stream');
 const util = require('util');
-const { hasTracing } = process.binding('config');
 const { fixturesDir } = require('./fixtures');
 const tmpdir = require('./tmpdir');
 
@@ -226,12 +225,6 @@ Object.defineProperty(exports, 'hasCrypto', {
   }
 });
 
-Object.defineProperty(exports, 'hasTracing', {
-  get: function() {
-    return Boolean(hasTracing);
-  }
-});
-
 Object.defineProperty(exports, 'hasFipsCrypto', {
   get: function() {
     return exports.hasCrypto && require('crypto').fips;

test/parallel/test-trace-events-api.js

@@ -3,7 +3,7 @@
 
 const common = require('../common');
 
-if (!common.hasTracing)
+if (!process.binding('config').hasTracing)
   common.skip('missing trace events');
 if (!common.isMainThread)
   common.skip('process.chdir is not available in Workers');