cleanup ignore lint error: no-reference-import

types/acorn/index.d.ts

@@ -3,8 +3,6 @@
 // Definitions by: RReverser <https://github.com/RReverser>, e-cloud <https://github.com/e-cloud>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
-/// <reference types="estree" />
-
 export as namespace acorn;
 export = acorn;
 import * as ESTree from 'estree';

types/acorn/tslint.json

@@ -6,7 +6,6 @@
         "export-just-namespace": false,
         "interface-name": false,
         "no-empty-interface": false,
-        "no-reference-import": false,
         "no-unnecessary-class": false
     }
 }