Revert "[MIRROR] Replace all secondary flags with bitflags stored in the flags_2 var" (#2457)

ok you know what yeah i think i'll properly mirror https://github.com/Citadel-Station-13/Citadel-Station-13/pull/2411

code/modules/surgery/organs/ears.dm

@@ -25,7 +25,7 @@
 	if(C.disabilities & DEAF)
 		deaf = max(deaf, 1)
 	else
-		if(C.ears && (C.ears.flags_2 & HEALS_EARS_2))
+		if(C.ears && HAS_SECONDARY_FLAG(C.ears, HEALS_EARS))
 			deaf = max(deaf - 1, 1)
 			ear_damage = max(ear_damage - 0.10, 0)
 		// if higher than UNHEALING_EAR_DAMAGE, no natural healing occurs.