/*
 * call-seq:
 * multi = Curl::Multi.new
 * easy = Curl::Easy.new('url')
 *
 * multi.add(easy)
 *
 * # sometime later
 * multi.remove(easy)
 *
 * Remove an easy handle from a multi stack.
 *
 * Will raise an exception if the easy handle is not found
 */
VALUE ruby_curl_multi_remove(VALUE self, VALUE easy) {