Stefan Krause pointed out a compiler warning with a picky MSCV compiler when

passing a curl_off_t argument to the Curl_read_rewind() function which takes
an size_t argument. Curl_read_rewind() also had debug code left in it and it
was put in a different source file with no good reason when only used from
one single spot.

lib/sendf.c

@@ -455,24 +455,6 @@ CURLcode Curl_client_write(struct connectdata *conn,
 
 #define MIN(a,b) (a < b ? a : b)
 
-void Curl_read_rewind(struct connectdata *conn,
-                      size_t extraBytesRead)
-{
-    char buf[512 + 1];
-    size_t bytesToShow;
-
-    conn->read_pos -= extraBytesRead;
-    conn->bits.stream_was_rewound = TRUE;
-
-    bytesToShow = MIN(conn->buf_len - conn->read_pos, sizeof(buf)-1);
-    memcpy(buf, conn->master_buffer + conn->read_pos, bytesToShow);
-    buf[bytesToShow] = '\0';
-
-    DEBUGF(infof(conn->data,
-                 "Buffer after stream rewind (read_pos = %d): [%s]",
-                 conn->read_pos, buf));
-}
-
 /*
  * Internal read-from-socket function. This is meant to deal with plain
  * sockets, SSL sockets and kerberos sockets.