Minor ESLint rules cleanup (twbs#32904)

Author: XhmikosR

.eslintrc.json

@@ -36,7 +36,6 @@
       "error",
       "always"
     ],
-    "prefer-named-capture-group": "off",
     "semi": [
       "error",
       "never"
@@ -52,7 +51,6 @@
     "unicorn/prefer-dom-node-append": "off",
     "unicorn/prefer-dom-node-dataset": "off",
     "unicorn/prefer-dom-node-remove": "off",
-    "unicorn/prefer-optional-catch-binding": "off",
     "unicorn/prefer-query-selector": "off",
     "unicorn/prefer-spread": "off",
     "unicorn/prevent-abbreviations": "off"

js/tests/unit/.eslintrc.json

@@ -1,16 +1,8 @@
 {
-  "root": true,
   "extends": [
     "../../../.eslintrc.json"
   ],
-  "overrides": [
-    {
-      "files": [
-        "**/*.spec.js"
-      ],
-      "env": {
-        "jasmine": true
-      }
-    }
-  ]
+  "env": {
+    "jasmine": true
+  }
 }