Remove checks that only adds RSS feed link on home and post pages

I actually don't really see a reason for this. Maybe you wouldn't want it on a documentation site, but I don't think that complexity is warranted now, and it's not within the 80% use case.

packages/framework/src/Concerns/HasPageMetadata.php

@@ -82,21 +82,7 @@ public function canUseCanonicalUrl(): bool
 
     public function canUseRssFeedLink(): bool
     {
-        if (RssFeedService::canGenerateFeed() && isset($this->slug)) {
-            if ($this instanceof MarkdownPost) {
-                return true;
-            }
-
-            if (str_starts_with($this->getCurrentPagePath(), 'post')) {
-                return true;
-            }
-
-            if ($this->getCurrentPagePath() === 'index') {
-                return true;
-            }
-        }
-
-        return false;
+        return RssFeedService::canGenerateFeed();
     }
 
     public function hasTwitterTitleInConfig(): bool