http://bugs.gentoo.org/423135

--- libusb/core.c
+++ libusb/core.c
@@ -32,12 +32,6 @@
 static libusb_context *ctx = NULL;
 static int usb_debug = 0;

-enum usbi_log_level {
-	LOG_LEVEL_DEBUG,
-	LOG_LEVEL_INFO,
-	LOG_LEVEL_WARNING,
-	LOG_LEVEL_ERROR,
-};

 #ifdef ENABLE_LOGGING
 #define _usbi_log(level, fmt...) usbi_log(level, __FUNCTION__, fmt)