Remove hot fix for Gatsby development build failure fixed.

This appears to be fixed in the latest Gatsby version as noted here: gatsbyjs/gatsby#29326 (comment)

Author: lukemcdonald

.babelrc

@@ -28,12 +28,10 @@
     }
   },
   "dependencies": {
-    "@babel/plugin-transform-spread": "^7.12.13",
     "@raae/gatsby-remark-oembed": "^0.1.1",
     "@tailwindcss/forms": "^0.2.1",
     "@tailwindcss/typography": "^0.4.0",
     "autoprefixer": "^10.2.4",
-    "babel-preset-gatsby": "^0.12.1",
     "classnames": "^2.2.6",
     "dotenv": "^8.2.0",
     "formik": "^2.2.6",