fs: fix to not return for void function

PR-URL: #50769
Reviewed-By: Matthew Aitken <maitken033380023@gmail.com>
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Qingyu Deng <i@ayase-lab.com>

lib/fs.js

@@ -534,7 +534,7 @@ function close(fd, callback = defaultCloseCallback) {
 function closeSync(fd) {
   fd = getValidatedFd(fd);
 
-  return binding.close(fd);
+  binding.close(fd);
 }
 
 /**
@@ -784,7 +784,7 @@ function readv(fd, buffers, position, callback) {
   if (typeof position !== 'number')
     position = null;
 
-  return binding.readBuffers(fd, buffers, position, req);
+  binding.readBuffers(fd, buffers, position, req);
 }
 
 ObjectDefineProperty(readv, kCustomPromisifyArgsSymbol,
@@ -860,7 +860,8 @@ function write(fd, buffer, offsetOrOptions, length, position, callback) {
 
     const req = new FSReqCallback();
     req.oncomplete = wrapper;
-    return binding.writeBuffer(fd, buffer, offset, length, position, req);
+    binding.writeBuffer(fd, buffer, offset, length, position, req);
+    return;
   }
 
   validateStringAfterArrayBufferView(buffer, 'buffer');
@@ -881,7 +882,7 @@ function write(fd, buffer, offsetOrOptions, length, position, callback) {
 
   const req = new FSReqCallback();
   req.oncomplete = wrapper;
-  return binding.writeString(fd, str, offset, length, req);
+  binding.writeString(fd, str, offset, length, req);
 }
 
 ObjectDefineProperty(write, kCustomPromisifyArgsSymbol,
@@ -971,7 +972,7 @@ function writev(fd, buffers, position, callback) {
   if (typeof position !== 'number')
     position = null;
 
-  return binding.writeBuffers(fd, buffers, position, req);
+  binding.writeBuffers(fd, buffers, position, req);
 }
 
 ObjectDefineProperty(writev, kCustomPromisifyArgsSymbol, {
@@ -1177,7 +1178,8 @@ function rmdir(path, options, callback) {
         if (err === false) {
           const req = new FSReqCallback();
           req.oncomplete = callback;
-          return binding.rmdir(path, req);
+          binding.rmdir(path, req);
+          return;
         }
         if (err) {
           return callback(err);
@@ -1190,7 +1192,7 @@ function rmdir(path, options, callback) {
     validateRmdirOptions(options);
     const req = new FSReqCallback();
     req.oncomplete = callback;
-    return binding.rmdir(path, req);
+    binding.rmdir(path, req);
   }
 }
 
@@ -1296,7 +1298,7 @@ function fdatasync(fd, callback) {
  */
 function fdatasyncSync(fd) {
   fd = getValidatedFd(fd);
-  return binding.fdatasync(fd);
+  binding.fdatasync(fd);
 }
 
 /**
@@ -1321,7 +1323,7 @@ function fsync(fd, callback) {
  */
 function fsyncSync(fd) {
   fd = getValidatedFd(fd);
-  return binding.fsync(fd);
+  binding.fsync(fd);
 }
 
 /**
@@ -1888,7 +1890,7 @@ function unlink(path, callback) {
  */
 function unlinkSync(path) {
   path = pathModule.toNamespacedPath(getValidatedPath(path));
-  return binding.unlink(path);
+  binding.unlink(path);
 }
 
 /**
@@ -2929,7 +2931,7 @@ realpath.native = (path, options, callback) => {
   path = getValidatedPath(path);
   const req = new FSReqCallback();
   req.oncomplete = callback;
-  return binding.realpath(pathModule.toNamespacedPath(path), options.encoding, req);
+  binding.realpath(pathModule.toNamespacedPath(path), options.encoding, req);
 };
 
 /**