http: drop http_error function

This function is a single-liner and is only called from one
place. Just inline it, which makes the code more obvious.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

http.c

@@ -941,11 +941,6 @@ cleanup:
 	return ret;
 }
 
-void http_error(const char *url)
-{
-	error("unable to access '%s': %s", url, curl_errorstr);
-}
-
 int http_fetch_ref(const char *base, struct ref *ref)
 {
 	char *url;