[4.0] Remove grunt in favour of native node build scripts (#18446)

Author: Dimitri Grammatikogianni

.eslintrc

@@ -0,0 +1,10 @@
+{
+	"extends": "airbnb-base",
+	"parser": "babel-eslint",
+	"env": {
+		"browser": true
+	},
+	"rules": {
+		"class-methods-use-this": "off"
+	}
+}