build: delete .babelrc

.babelrc

@@ -1,20 +0,0 @@
-{
-  "presets": [
-      ["@babel/preset-env", {
-          "targets": {
-              "browsers": ["Android >= 4", "iOS >= 8"]
-          },
-          "modules": false,
-          "loose": true
-      }]
-  ],
-  "plugins": [
-      "@babel/plugin-external-helpers",
-      [
-          "@babel/plugin-transform-runtime",
-          {
-              "regenerator": true
-          }
-      ]
-  ]
-}