Replace "Unreferenced" labels with "; unreferenced" comments

engine/rtc/print_hours_mins.asm

@@ -1,4 +1,4 @@
-Unreferenced_Function1dd6a9:
+Function1dd6a9: ; unreferenced
 	ld a, b
 	ld b, c
 	ld c, a

engine/rtc/restart_clock.asm

@@ -206,8 +206,7 @@ RestartClock:
 	ld [wBuffer2], a
 	ret
 
-.unreferenced
-; unused
+.UnusedPlaceCharsFragment: ; unreferenced
 	ld a, [wBuffer3]
 	ld b, a
 	call Coord2Tile
@@ -227,10 +226,8 @@ RestartClock:
 	ld [hl], e
 	ret
 
-UnreferencedString_HourJP:
-; unused
+JPHourString: ; unreferenced
 	db "じ@" ; HR
 
-UnreferencedString_MinuteJP:
-; unused
+JPMinuteString: ; unreferenced
 	db "ふん@" ; MIN

engine/rtc/rtc.asm

@@ -1,4 +1,4 @@
-Unreferenced_StopRTC:
+StopRTC: ; unreferenced
 	ld a, SRAM_ENABLE
 	ld [MBC3SRamEnable], a
 	call LatchClock
@@ -54,7 +54,7 @@ TimesOfDay:
 	db MAX_HOUR,  NITE_F
 	db -1, MORN_F
 
-Unreferenced_1404e:
+BetaTimesOfDay: ; unreferenced
 	db 20, NITE_F
 	db 40, MORN_F
 	db 60, DAY_F

engine/rtc/timeset.asm

@@ -196,7 +196,7 @@ DisplayHourOClock:
 	pop hl
 	ret
 
-UnreferencedFunction907f1:
+Function907f1: ; unreferenced
 	ld h, d
 	ld l, e
 	push hl
@@ -593,7 +593,7 @@ InitialClearDSTFlag:
 	text_far _TimeAskOkayText
 	text_end
 
-Unreferenced_MrChrono:
+MrChrono: ; unreferenced
 	hlcoord 1, 14
 	lb bc, 3, SCREEN_WIDTH - 2
 	call ClearBox