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.h

@@ -135,11 +135,6 @@ extern char *get_remote_object_url(const char *url, const char *hex,
  */
 int http_get_strbuf(const char *url, struct strbuf *content_type, struct strbuf *result, int options);
 
-/*
- * Prints an error message using error() containing url and curl_errorstr.
- */
-void http_error(const char *url);
-
 extern int http_fetch_ref(const char *base, struct ref *ref);
 
 /* Helpers for fetching packs */