Remove react-spinners-kit dependency and its usage in Editor.jsx to streamline the code and reduce bundle size.

Author: souravrax

package.json

@@ -20,7 +20,6 @@
     "react-redux": "^7.2.2",
     "react-resize-detector": "^5.2.0",
     "react-select": "^3.1.0",
-    "react-spinners-kit": "^1.9.1",
     "react-split-pane": "^0.1.92",
     "redux": "^5.0.1",
     "redux-devtools-extension": "^2.13.8",