binman: Avoid skipping binman_init()

A recent lwip change stopped binman's init from working, so it is not
possible to read nodes from the image description anymore.

Correct this by dropping the offending line.

Signed-off-by: Simon Glass <sjg@chromium.org>
Fixes: 4d4d783812 net: lwip: add TFTP support and tftpboot command

lib/binman.c

@@ -137,7 +137,6 @@ int binman_init(void)
 {
 	int ret;
 
-	return 0;
 	binman = malloc(sizeof(struct binman_info));
 	if (!binman)
 		return log_msg_ret("space for binman", -ENOMEM);