refactor: remove unused LibrariesIO source

conda_forge_tick/update_sources.py

@@ -616,20 +616,6 @@ def get_version(self, url: str) -> Optional[str]:
         return latest
 
 
-class LibrariesIO(VersionFromFeed):
-    name = "LibrariesIO"
-
-    def get_url(self, meta_yaml) -> Optional[str]:
-        urls = meta_yaml["url"]
-        if not isinstance(meta_yaml["url"], list):
-            urls = [urls]
-        for url in urls:
-            if self.url_contains not in url:
-                continue
-            pkg = self.package_name(url)
-            return f"https://libraries.io/{self.name}/{pkg}/versions.atom"
-
-
 class NVIDIA(AbstractSource):
     """Like BaseRawURL but it embeds logic based on NVIDIA's packaging schema."""