attr: make git_attr_counted static

It's not used outside the attr code, so let's keep it private.

Change-Id: I0d15e0f2ea944b31d68b9cf1a4edecac0ca2170d
Signed-off-by: Stefan Beller <[email protected]>

Author: stefanbeller

attr.c

@@ -108,7 +108,7 @@ static void report_invalid_attr(const char *name, size_t len,
 	strbuf_release(&err);
 }
 
-struct git_attr *git_attr_counted(const char *name, size_t len)
+static struct git_attr *git_attr_counted(const char *name, size_t len)
 {
 	unsigned hval = hash_name(name, len);
 	unsigned pos = hval % HASHSIZE;

attr.h

@@ -10,9 +10,6 @@ struct git_attr;
  */
 extern struct git_attr *git_attr(const char *);
 
-/* The same, but with counted string */
-extern struct git_attr *git_attr_counted(const char *, size_t);
-
 extern int attr_name_valid(const char *name, size_t namelen);
 extern void invalid_attr_name_message(struct strbuf *, const char *, int);