Remove outdated comment

Author: engigeer

display/i2c_interface.c

@@ -441,7 +441,7 @@ void display_init (void)
 
         status_packet.address = 0;
     #if N_AXIS == 3
-        status_packet.coordinate.a = NAN; // TODO: should be changed to NAN
+        status_packet.coordinate.a = NAN;
     #endif
 
         // delay final setup until startup is complete