Return to default deb after install script

Upstream electron-builder now contains the SUID sandbox change.

See also https://github.com/electron-userland/electron-builder/pull/4163

electron_app/build/linux/after-install.tpl

@@ -1,14 +0,0 @@
-#!/bin/bash
-
-# Link to the binary
-ln -sf '/opt/${productFilename}/${executable}' '/usr/bin/${executable}'
-
-# SUID chrome-sandbox for Electron 5+
-# Remove this entire file (after-install.tpl) and remove the reference in
-# package.json once this change has been upstreamed so we go back to the copy
-# from upstream.
-# https://github.com/electron-userland/electron-builder/pull/4163
-chmod 4755 '/opt/${productFilename}/chrome-sandbox' || true
-
-update-mime-database /usr/share/mime || true
-update-desktop-database /usr/share/applications || true

package.json

@@ -173,9 +173,6 @@
         "StartupWMClass": "riot"
       }
     },
-    "deb": {
-      "afterInstall": "electron_app/build/linux/after-install.tpl"
-    },
     "mac": {
       "category": "public.app-category.social-networking",
       "darkModeSupport": true