This RFC is about removing the curl stream wrappers of the PHP as of 5.5 and to move it on PECL for any eventual improvements.
This RFC is not about removing ext/curl from PHP.
The curl-stream-wrappers feature is a replacement for the php's stream implemenation, for fopen and other file_get_contents, not the curl_* functions.
Vote starts April 17th, and ends April 24th