path.c: drop git_path_submodule

There are no callers of the slightly-dangerous static-buffer
git_path_submodule left. Let's drop it.

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

cache.h

@@ -713,12 +713,11 @@ extern int check_repository_format(void);
  * the repository directory (git_path), or in a submodule's repository
  * directory (git_path_submodule). In all cases, note that the result
  * may be overwritten by another call to _any_ of the functions. Consider
- * using the safer "dup" or "strbuf" formats below.
+ * using the safer "dup" or "strbuf" formats below (in some cases, the
+ * unsafe versions have already been removed).
  */
 extern const char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
 extern const char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
-extern const char *git_path_submodule(const char *path, const char *fmt, ...)
-	__attribute__((format (printf, 2, 3)));
 
 extern char *mksnpath(char *buf, size_t n, const char *fmt, ...)
 	__attribute__((format (printf, 3, 4)));

path.c

@@ -245,16 +245,6 @@ static void do_submodule_path(struct strbuf *buf, const char *path,
 	strbuf_cleanup_path(buf);
 }
 
-const char *git_path_submodule(const char *path, const char *fmt, ...)
-{
-	va_list args;
-	struct strbuf *buf = get_pathname();
-	va_start(args, fmt);
-	do_submodule_path(buf, path, fmt, args);
-	va_end(args);
-	return buf->buf;
-}
-
 char *git_pathdup_submodule(const char *path, const char *fmt, ...)
 {
 	va_list args;