wt-status: remove unused field in grab_1st_switch_cbdata

The struct grab_1st_switch_cbdata has the field "found", which is
set in grab_1st_switch() when a match is found.  This information is
redundant and unused by any code.  The return value of the function
serves to communicate this information anyway.

Remove the field.

Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

wt-status.c

@@ -1035,7 +1035,6 @@ static char *read_and_strip_branch(const char *path)
 }
 
 struct grab_1st_switch_cbdata {
-	int found;
 	struct strbuf buf;
 	unsigned char nsha1[20];
 };
@@ -1059,7 +1058,6 @@ static int grab_1st_switch(unsigned char *osha1, unsigned char *nsha1,
 	for (end = target; *end && *end != '\n'; end++)
 		;
 	strbuf_add(&cb->buf, target, end - target);
-	cb->found = 1;
 	return 1;
 }