readme: remove outdated reference to inability to handle brackets in …

…remote_url paths

README.md

@@ -380,9 +380,7 @@ form and you're good to go:
 If you're using ActiveRecord, CarrierWave will indicate invalid URLs and download
 failures automatically with attribute validation errors. If you aren't, or you
 disable CarrierWave's `validate_download` option, you'll need to handle those
-errors yourself. And please note that CarrierWave does its best to interpret
-URLs intelligently, but this is [not always possible](https://github.com/jnicklas/carrierwave/wiki/Known-Issues),
-particularly in the case of unencoded `:?[]` characters in the URL path.
+errors yourself.
 
 ## Providing a default URL