pathspec: remove unnecessary function prototypes

A few functions were removed in 5a76aff1 ("add: convert to use
parse_pathspec", 2013-07-14), but we forgot to remove their external
declarations from pathspec.h while doing so.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

pathspec.h

@@ -96,7 +96,5 @@ static inline int ps_strcmp(const struct pathspec_item *item,
 
 extern char *find_pathspecs_matching_against_index(const struct pathspec *pathspec);
 extern void add_pathspec_matches_against_index(const struct pathspec *pathspec, char *seen);
-extern const char *check_path_for_gitlink(const char *path);
-extern void die_if_path_beyond_symlink(const char *path, const char *prefix);
 
 #endif /* PATHSPEC_H */