Remove _writev in fs-writable

lib/fs-writable.js

@@ -27,16 +27,6 @@ const {
   ERR_OUT_OF_RANGE
 } = require('./errors');
 
-const { FSReqCallback, writeBuffers } = process.binding('fs');
-
-const writev = (fd, chunks, position, callback) => {
-  const wrapper = (err, written) => { callback(err, written || 0, chunks); };
-
-  const req = new FSReqCallback();
-  req.oncomplete = wrapper;
-  writeBuffers(fd, chunks, position, req);
-};
-
 const closeFsStream = (stream, cb, err) => {
   fs.close(stream.fd, (er) => {
     er = er || err;
@@ -124,35 +114,6 @@ class WriteStream extends Writable {
 
   }
 
-  _writev(data, cb) {
-    if (typeof this.fd !== 'number') {
-      return this.once('open', () => { this._writev(data, cb); });
-    }
-
-    const self = this;
-    const len = data.length;
-    const chunks = new Array(len);
-    let size = 0;
-
-    for (let i = 0; i < len; i++) {
-      const chunk = data[i];
-
-      chunks[i] = chunk;
-      size += chunk.length;
-    }
-
-    writev(this.fd, chunks, this.pos, (er, bytes) => {
-      if (er) {
-        self.destroy();
-        return cb(er);
-      }
-      self.bytesWritten += bytes;
-      cb();
-    });
-
-    if (this.pos !== undefined) this.pos += size;
-  }
-
   close(cb) {
     if (cb) {
       if (this.closed) {