lib: cache user prefixes in database object

[notmuch] / lib / thread.cc

diff --git a/lib/thread.cc b/lib/thread.cc
index c9c9398fd9d0788e2cebe86d43848ebc82a5a412..fd0e1393be51f17011ca3b96b190f8a8159ce606 100644 (file)
--- a/lib/thread.cc
+++ b/lib/thread.cc
@@ -30,8 +30,6 @@
 #define THREAD_DEBUG(format, ...) do {} while (0) /* ignored */
 #endif
 
-#define EMPTY_STRING(s) ((s)[0] == '\0')
-
 struct _notmuch_thread {
     notmuch_database_t *notmuch;
     char *thread_id;