tools: enable no-useless-return eslint rule

PR-URL: https://github.com/nodejs/node/pull/12577
Reviewed-By: Vse Mozhet Byt <vsemozhetbyt@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Teddy Katz <teddy.katz@gmail.com>
Reviewed-By: Roman Reiss <me@silverwind.io>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>

6 files changed, 5 insertions, 7 deletions

diff --git a/.eslintrc.yaml b/.eslintrc.yaml
index b44c59caf3..d06dff8fcd 100644
--- a/.eslintrc.yaml
+++ b/.eslintrc.yaml
@@ -46,6 +46,7 @@ rules:
   no-unused-labels: 2
   no-useless-call: 2
   no-useless-escape: 2
+  no-useless-return: 2
   no-void: 2
   no-with: 2
 
diff --git a/doc/api/errors.md b/doc/api/errors.md
index 96409a5367..76679d3be4 100644
--- a/doc/api/errors.md
+++ b/doc/api/errors.md
@@ -64,6 +64,7 @@ Errors that occur within _Asynchronous APIs_ may be reported in multiple ways:
   argument is not `null` and is an instance of `Error`, then an error occurred
   that should be handled.
 
+<!-- eslint-disable no-useless-return -->
   ```js
   const fs = require('fs');
   fs.readFile('a file that does not exist', (err, data) => {
diff --git a/doc/api/stream.md b/doc/api/stream.md
index 29eb47cbe3..4f95d03692 100644
--- a/doc/api/stream.md
+++ b/doc/api/stream.md
@@ -1566,6 +1566,7 @@ unexpected and inconsistent behavior depending on whether the stream is
 operating in flowing or paused mode. Using the `'error'` event ensures
 consistent and predictable handling of errors.
 
+<!-- eslint-disable no-useless-return -->
 ```js
 const Readable = require('stream').Readable;
 
diff --git a/lib/dgram.js b/lib/dgram.js
index 4beb283519..c43cb55082 100644
--- a/lib/dgram.js
+++ b/lib/dgram.js
@@ -282,7 +282,6 @@ function enqueue(self, toEnqueue) {
     self.once('listening', clearQueue);
   }
   self._queue.push(toEnqueue);
-  return;
 }
 
 
diff --git a/test/parallel/test-require-symlink.js b/test/parallel/test-require-symlink.js
index 4e74606bed..964f856829 100644
--- a/test/parallel/test-require-symlink.js
+++ b/test/parallel/test-require-symlink.js
@@ -30,9 +30,9 @@ if (common.isWindows) {
     if (err || !o.includes('SeCreateSymbolicLinkPrivilege')) {
       common.skip('insufficient privileges');
       return;
-    } else {
-      test();
     }
+
+    test();
   });
 } else {
   test();
diff --git a/tools/doc/json.js b/tools/doc/json.js
index 3e329a965f..c711783f14 100644
--- a/tools/doc/json.js
+++ b/tools/doc/json.js
@@ -222,7 +222,6 @@ function processList(section) {
         current.options.push(n);
         current = n;
       }
-      return;
     } else if (type === 'list_item_end') {
       if (!current) {
         throw new Error('invalid list - end without current item\n' +
@@ -495,9 +494,6 @@ function finishSection(section, parent) {
             parent[k] = parent[k].concat(section[k]);
           } else if (!parent[k]) {
             parent[k] = section[k];
-          } else {
-            // parent already has, and it's not an array.
-            return;
           }
       }
     });