fix: remove unused error variable in cache.ts

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Co-Authored-By: Claude <noreply@anthropic.com>

apps/web/src/lib/og/cache.ts

@@ -43,7 +43,7 @@ export async function getCachedImage(path: string): Promise<string | null> {
     }
 
     return blob.url;
-  } catch (error) {
+  } catch {
     // Blob doesn't exist or error accessing it
     return null;
   }