lib/Configuration: Remove redundant comment
lib/Configuration: Remove redundant comment

It was just getting out of sync:

- Minimum PHP version was bumped in 8365a7a34dea6750fab4c29541ec1801cdbc83e4
- Cache directory permission check was removed in 8e2b65556f0a5eb063761d594f2fd6ac1b10d154
- Whitelist permission check was removed in d4e867f2403c6224c93d8588fadbde600aec4444

ORelio/rss-bridge,Riduidel/rss-bridge,ORelio/rss-bridge,RSS-Bridge/rss-bridge,ORelio/rss-bridge,Riduidel/rss-bridge,RSS-Bridge/rss-bridge,RSS-Bridge/rss-bridge,Riduidel/rss-bridge