Re-enable the max-len ESLint rule. (#5265)

packages/babel-types/src/constants.js

@@ -1,4 +1,4 @@
-/* eslint max-len: 0 */
+/* eslint max-len: "off" */
 
 export const STATEMENT_OR_BLOCK_KEYS = ["consequent", "body", "alternate"];
 export const FLATTENABLE_KEYS        = ["body", "expressions"];

packages/babel-types/src/definitions/core.js

@@ -1,4 +1,4 @@
-/* eslint max-len: 0 */
+/* eslint max-len: "off" */
 
 import * as t from "../index";
 

packages/babel-types/src/definitions/es2015.js

@@ -1,4 +1,4 @@
-/* eslint max-len: 0 */
+/* eslint max-len: "off" */
 
 import defineType, {
   assertNodeType,

packages/babel-types/src/validators.js

@@ -1,5 +1,3 @@
-/* eslint indent: 0 */
-
 import { getBindingIdentifiers } from "./retrievers";
 import esutils from "esutils";
 import * as t from "./index";
@@ -276,7 +274,7 @@ export function isNodesEquivalent(a, b) {
     }
 
     if (!isNodesEquivalent(a[field], b[field])) {
-     return false;
+      return false;
     }
   }