Comment, remove, or revise many unreferenced labels

engine/debug/color_picker.asm

@@ -32,7 +32,7 @@
 	const DEBUGCOLORMAIN_INITTMHM       ; 4
 	const DEBUGCOLORMAIN_TMHMJOYPAD     ; 5
 
-DebugColorPicker:
+DebugColorPicker: ; unreferenced
 ; A debug menu to test monster and trainer palettes at runtime.
 	ldh a, [hCGB]
 	and a
@@ -1069,7 +1069,7 @@ INCBIN "gfx/debug/up_arrow.2bpp"
 DebugColor_GFX:
 INCBIN "gfx/debug/color_test.2bpp"
 
-TilesetColorPicker:
+TilesetColorPicker: ; unreferenced
 ; A debug menu to test tileset palettes at runtime.
 ; dummied out
 	ret

engine/debug/debug_room.asm

@@ -1328,9 +1328,9 @@ DebugRoom_BoxStructStrings:
 .Move4:     db "MOVE 4@"
 .ID0:       db "ID[0]@"
 .ID1:       db "ID[1]@"
-.BaseExp0:  db "BASE EXP[0]@"
-.BaseExp1:  db "BASE EXP[1]@"
-.BaseExp2:  db "BASE EXP[2]@"
+.BaseExp0:  db "BASE EXP[0]@" ; unreferenced
+.BaseExp1:  db "BASE EXP[1]@" ; unreferenced
+.BaseExp2:  db "BASE EXP[2]@" ; unreferenced
 .HPExp0:    db "HP EXP[0]@"
 .HPExp1:    db "HP EXP[1]@"
 .AttkExp0:  db "ATTK EXP[0]@"