printk: remove unused code from kernel/printk.c

both log_buf_copy() and log_buf_len are unused.
Signed-off-by: Ingo Molnar <mingo@elte.hu>

kernel/printk.c

@@ -232,45 +232,6 @@ static inline void boot_delay_msec(void)
 }
 #endif
 
-/*
- * Return the number of unread characters in the log buffer.
- */
-static int log_buf_get_len(void)
-{
-	return logged_chars;
-}
-
-/*
- * Copy a range of characters from the log buffer.
- */
-int log_buf_copy(char *dest, int idx, int len)
-{
-	int ret, max;
-	bool took_lock = false;
-
-	if (!oops_in_progress) {
-		spin_lock_irq(&logbuf_lock);
-		took_lock = true;
-	}
-
-	max = log_buf_get_len();
-	if (idx < 0 || idx >= max) {
-		ret = -1;
-	} else {
-		if (len > max)
-			len = max;
-		ret = len;
-		idx += (log_end - max);
-		while (len-- > 0)
-			dest[len] = LOG_BUF(idx + len);
-	}
-
-	if (took_lock)
-		spin_unlock_irq(&logbuf_lock);
-
-	return ret;
-}
-
 /*
  * Commands to do_syslog:
  *