Use builtin bigint support

Author: goto-bus-stop

build.js

@@ -22,7 +22,6 @@ function privateClassElements (str) {
   return str.replace('acorn-private-class-elements', '../private-class-elements')
 }
 
-compile('acorn-bigint', './lib/bigint/index.js')
 compile('acorn-import-meta', './lib/import-meta/index.js')
 compile('acorn-export-ns-from', './lib/export-ns-from/index.js')
 compile('acorn-class-fields', './lib/class-fields/index.js', privateClassElements)

index.js

@@ -2,7 +2,6 @@ var acorn = require('acorn')
 var xtend = require('xtend')
 
 var CJSParser = acorn.Parser
-  .extend(require('./lib/bigint'))
   .extend(require('./lib/class-fields'))
   .extend(require('./lib/static-class-features'))
 var ESModulesParser = CJSParser

lib/bigint/index.js

@@ -12,7 +12,6 @@
     "xtend": "^4.0.2"
   },
   "devDependencies": {
-    "acorn-bigint": "^0.4.0",
     "acorn-class-fields": "^0.3.1",
     "acorn-export-ns-from": "^0.1.0",
     "acorn-import-meta": "^1.0.0",