Replace "Unreferenced" labels with "; unreferenced" comments

data/pokemon/unused_pic_banks.asm

@@ -1,7 +1,7 @@
 ; This was a table of Pokémon sprite banks in the 1997 G/S prototype.
 ; See pokegold-spaceworld's gfx/pokemon/pkmn_pic_banks.asm.
 
-Unreferenced_MonPicBanks:
+BetaMonPicBanks: ; unreferenced
 	; last mon in bank, bank #
 	db RAICHU,    $15 + 0
 	db DUGTRIO,   $15 + 1

data/text/unused_dakutens.asm

@@ -1,4 +1,4 @@
-UnreferencedDakutens:
+Dakutens: ; unreferenced
 	db "かが", "きぎ", "くぐ", "けげ", "こご"
 	db "さざ", "しじ", "すず", "せぜ", "そぞ"
 	db "ただ", "ちぢ", "つづ", "てで", "とど"
@@ -9,7 +9,7 @@ UnreferencedDakutens:
 	db "ハバ", "ヒビ", "フブ", "へべ", "ホボ"
 	db -1 ; end
 
-UnreferencedHandakutens:
+Handakutens: ; unreferenced
 	db "はぱ", "ひぴ", "ふぷ", "へぺ", "ほぽ"
 	db "ハパ", "ヒピ", "フプ", "へぺ", "ホポ"
 	db -1 ; end