builtin-commit.c: remove useless check added by faulty cut and paste

2888605c64 (builtin-commit: fix
partial-commit support) mindlessly cut and pasted from
builtin-ls-files.c, and included a part that was meant to
exclude redundant path after "ls-files --with-tree" overlayed
the HEAD commit on top of the index.  This logic does not apply
to what git-commit does and should not have been copied, even
though it would not hurt.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin-commit.c

@@ -156,8 +156,6 @@ static int list_paths(struct path_list *list, const char *with_tree,
 
 	for (i = 0; i < active_nr; i++) {
 		struct cache_entry *ce = active_cache[i];
-		if (ce->ce_flags & htons(CE_UPDATE))
-			continue;
 		if (!pathspec_match(pattern, m, ce->name, 0))
 			continue;
 		path_list_insert(ce->name, list);