Remove deprecated methods from document

Author: diegomura

lib/document.js

@@ -4,7 +4,6 @@ By Devon Govett
 */
 
 import stream from 'stream';
-import fs from 'fs';
 import PDFObject from './object';
 import PDFReference from './reference';
 import PDFPage from './page';
@@ -205,30 +204,6 @@ class PDFDocument extends stream.Readable {
     }
   }
 
-  write(filename, fn) {
-    // print a deprecation warning with a stacktrace
-    const err = new Error(`\
-PDFDocument#write is deprecated, and will be removed in a future version of PDFKit. \
-Please pipe the document into a Node stream.\
-`
-    );
-
-    console.warn(err.stack);
-
-    this.pipe(fs.createWriteStream(filename));
-    this.end();
-    return this.once('end', fn);
-  }
-
-  output(fn) {
-    // more difficult to support this. It would involve concatenating all the buffers together
-    throw new Error(`\
-PDFDocument#output is deprecated, and has been removed from PDFKit. \
-Please pipe the document into a Node stream.\
-`
-    );
-  }
-
   end() {
     this.flushPages();
     this._info = this.ref();