Fix HUD artifact: Revert FloorIndicator overflow from Song of Storms commit

The changes in commit 841ef2d added ~15 bytes to FloorIndicator, exceeding
its 156-byte size limit ($0AFD0C-$0AFDA7) and causing ROM corruption that
manifested as a brown/black tile artifact below the HUD item box.

Reverted changes:
- BNE+JMP pattern back to BEQ (saves 3 bytes)
- Removed Song of Storms rain check from FloorIndicator (saves 12 bytes)

Song of Storms functionality in ZSCustomOverworld.asm remains intact.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Menu/menu_hud.asm

@@ -551,9 +551,7 @@ org $0AFD0C
 FloorIndicator:
 {
   REP   #$30
-  LDA   $04A0 : AND.w #$00FF : BNE +
+  LDA   $04A0 : AND.w #$00FF : BEQ .hide_indicator
-    JMP .hide_indicator
-  +
   INC   A : CMP.w #$00C0 : BNE .dont_disable
     ; if the count up timer reaches 0x00BF frames
     ; disable the floor indicator during the next frame.
@@ -577,12 +575,7 @@ FloorIndicator:
   LDA   $A0 : CMP.w #$0002 : BEQ .sanctuary_rat_room
   SEP   #$20
 
-  ; Check if Song of Storms rain is active
+  ; Check the world state
-  LDA.l $7EE00E : BEQ .checkIntroRain
-    LDA.b #$05 : STA $012D  ; Indoor rain SFX
-    BRA .no_rain_state
-  .checkIntroRain
-  ; Check the world state (intro rain)
   LDA   $7EF3C5 : CMP.b #$02 : BCS .no_rain_state
     ; cause the ambient rain sound to occur (indoor version)
     LDA.b #$05 : STA $012D