feat: hide problematic elements

This hides the eu cookie notice which contains a problematic redirect
to new.reddit.com. It also hides the "get new" link in the header.

Closes https://github.com/tom-james-watson/old-reddit-redirect/issues/50
Closes https://github.com/tom-james-watson/old-reddit-redirect/issues/51

manifest.json

@@ -8,6 +8,11 @@
     "48": "img/icon48.png",
     "128": "img/icon128.png"
   },
+  "content_scripts": [{
+    "matches": [ "*://old.reddit.com/*" ],
+    "css": [ "styles.css" ],
+    "run_at": "document_start"
+  }],
   "permissions": [
     "webRequest",
     "webRequestBlocking",

styles.css

@@ -0,0 +1,4 @@
+#eu-cookie-policy,
+#redesign-beta-optin-btn {
+  display: none;
+}