Revert "Install pg-native"

This reverts commit b157885.

Installing pg-native fails on netlify due to node-libpq.

Seems to be a known issue:
- https://community.netlify.com/t/unable-to-publish-function-using-postgres/12293/3
- netlify/build-image#393

next.config.js

@@ -1,4 +1,12 @@
 module.exports = {
   // Target must be serverless
   target: 'serverless',
+  webpack: (config, { buildId, dev, isServer, defaultLoaders, webpack }) => {
+    // Note: we provide webpack above so you should not `require` it
+    // Perform customizations to webpack config
+    config.plugins.push(new webpack.IgnorePlugin(/.\/native/))
+
+    // Important: return the modified config
+    return config
+  },
 };

package.json

@@ -14,7 +14,6 @@
     "next-on-netlify": "^2.3.2",
     "pg": "^8.3.2",
     "pg-hstore": "^2.3.3",
-    "pg-native": "^3.0.0",
     "react": "^16.12.0",
     "react-dom": "^16.12.0",
     "sequelize": "^6.3.4"