name-rev: drop unused parameters from is_better_name()

When this function was extracted in 0041bf6 (name-rev: refactor logic
to see if a new candidate is a better name, 2017-03-29), it ended up
getting more arguments than it needs.

It's possible we may later use these values to evaluate the name, but
since it's a static function with a single caller, it will be easy to
add them back then.

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

Author: peff

builtin/name-rev.c

@@ -40,9 +40,7 @@ static void set_commit_rev_name(struct commit *commit, struct rev_name *name)
 }
 
 static int is_better_name(struct rev_name *name,
-			  const char *tip_name,
 			  timestamp_t taggerdate,
-			  int generation,
 			  int distance,
 			  int from_tag)
 {
@@ -103,8 +101,7 @@ static void name_rev(struct commit *commit,
 		name = xmalloc(sizeof(rev_name));
 		set_commit_rev_name(commit, name);
 		goto copy_data;
-	} else if (is_better_name(name, tip_name, taggerdate,
-				  generation, distance, from_tag)) {
+	} else if (is_better_name(name, taggerdate, distance, from_tag)) {
 copy_data:
 		name->tip_name = tip_name;
 		name->taggerdate = taggerdate;