diff --git a/avr/timer.asm b/avr/timer.asm
index 1b379f4..d91e4fd 100644
--- a/avr/timer.asm
+++ b/avr/timer.asm
@@ -6,14 +6,6 @@
 .equ TIMER_FLAGS_100MS       = 1
 .equ TIMER_FLAGS_1S          = 2
 
-.equ TIMER_CALLBACK_10S    =  0x01
-.equ TIMER_CALLBACK_30S    =  0x02
-.equ TIMER_CALLBACK_1M     =  0x04
-.equ TIMER_CALLBACK_15M    =  0x08
-.equ TIMER_CALLBACK_30M    =  0x10
-.equ TIMER_CALLBACK_1H     =  0x20
-.equ TIMER_CALLBACK_12H    =  0x40
-.equ TIMER_CALLBACK_1D     =  0x80