Switch to xo and remove babel-eslint

js/tests/unit/.eslintrc.json

@@ -1,40 +1,35 @@
 {
-  "env": {
-    "es6": false,
-    "jquery": true,
-    "qunit": true
-  },
-  "globals": {
-    "bootstrap": false,
-    "sinon": false,
-    "Util": false,
-    "Alert": false,
-    "Button": false,
-    "Carousel": false,
-    "Simulator": false,
-    "Toast": false
-  },
-  "parserOptions": {
-    "ecmaVersion": 5,
-    "sourceType": "script"
-  },
-  "extends": "../../../.eslintrc.json",
-  "rules": {
-    "no-console": "error",
-    // Best Practices
-    "consistent-return": "off",
-    "no-magic-numbers": "off",
-    "vars-on-top": "off",
-
-    // Stylistic Issues
-    "func-style": "off",
-    "spaced-comment": "off",
-
-    // ECMAScript 6
-    "no-var": "off",
-    "object-shorthand": "off",
-    "prefer-arrow-callback": "off",
-    "prefer-template": "off",
-    "prefer-rest-params": "off"
-  }
+  "extends": [
+    "../../../.eslintrc.json"
+  ],
+  "overrides": [
+    {
+      "files": [
+        "*.js"
+      ],
+      "env": {
+        "es6": false,
+        "jquery": true,
+        "qunit": true
+      },
+      "globals": {
+        "bootstrap": false,
+        "sinon": false,
+        "Util": false,
+        "Alert": false,
+        "Button": false,
+        "Carousel": false,
+        "Simulator": false,
+        "Toast": false
+      },
+      "rules": {
+        // ES6
+        "no-var": "off",
+        "object-shorthand": "off",
+        "prefer-arrow-callback": "off",
+        "prefer-template": "off",
+        "prefer-rest-params": "off"
+      }
+    }
+  ]
 }