Remove AFMFont.open

Author: blikblum

lib/font/afm.js

@@ -1,5 +1,3 @@
-import fs from 'fs';
-
 const WIN_ANSI_MAP = {
   402: 131,
   8211: 150,
@@ -105,10 +103,6 @@ udieresis     yacute         thorn          ydieresis\
 `.split(/\s+/);
 
 class AFMFont {
-  static open(filename) {
-    return new AFMFont(fs.readFileSync(filename, 'utf8'));
-  }
-
   constructor(contents) {
     this.contents = contents;
     this.attributes = {};