test: remove testing for "q"

"q" has been deprecated and superseded by js native Promise.

package.json

@@ -61,7 +61,6 @@
     "ncp": "^2.0.0",
     "nyc": "15.1.0",
     "pug": "3.0.3",
-    "q": "1.5.1",
     "sinon": "19.0.2",
     "stream-browserify": "3.0.0",
     "tsd": "0.31.2",

test/connection.test.js

@@ -7,7 +7,6 @@
 const start = require('./common');
 
 const STATES = require('../lib/connectionState');
-const Q = require('q');
 const assert = require('assert');
 const mongodb = require('mongodb');
 const MongooseError = require('../lib/error/index');
@@ -119,20 +118,6 @@ describe('connections:', function() {
       }, /string.*createConnection/);
     });
 
-    it('resolving with q (gh-5714)', async function() {
-      const bootMongo = Q.defer();
-
-      const conn = mongoose.createConnection(start.uri);
-
-      conn.on('connected', function() {
-        bootMongo.resolve(this);
-      });
-
-      const _conn = await bootMongo.promise;
-      assert.equal(_conn, conn);
-      await conn.close();
-    });
-
     it('connection plugins (gh-7378)', async function() {
       const conn1 = mongoose.createConnection(start.uri);
       const conn2 = mongoose.createConnection(start.uri);