feat: Update electron docs (#1241)

* feat: Update electron docs

* fix: typos

* meta: Update code example

* docs(electron): Remove Electron docs

Author: HazAT

docs/integrations/electron.rst

@@ -36,7 +36,6 @@ To install a plugin just include the plugin **after** Raven has been loaded and
    angularjs
    angular
    backbone
-   electron
    ember
    react
    vue

docs/integrations/index.rst

@@ -38,15 +38,6 @@
         "integrations/backbone#configuring-the-client"
       ]
     },
-    "javascript.electron": {
-      "name": "Electron",
-      "type": "framework",
-      "doc_link": "integrations/electron/",
-      "wizard": [
-        "integrations/electron#installation",
-        "integrations/electron#configuring-the-client"
-      ]
-    },
     "javascript.ember": {
       "name": "Ember",
       "type": "framework",