SDL: Remove unused `hardwareKeyboard` variable

SDL Commits
1 
From 72895a6994d8f4e00300c491d3db2b1ab4f56d5d Mon Sep 17 00:00:00 2001
From: Salman Alshamrani <[EMAIL REDACTED]>
Date: Sun, 3 Nov 2024 23:10:46 -0500
Subject: [PATCH] Remove unused `hardwareKeyboard` variable

---
 src/video/uikit/SDL_uikitviewcontroller.m | 2 --
 1 file changed, 2 deletions(-)

diff --git a/src/video/uikit/SDL_uikitviewcontroller.m b/src/video/uikit/SDL_uikitviewcontroller.m
index 57f4888d0d01c..3c3cae8555463 100644
--- a/src/video/uikit/SDL_uikitviewcontroller.m
+++ b/src/video/uikit/SDL_uikitviewcontroller.m
@@ -80,7 +80,6 @@ @implementation SDL_uikitviewcontroller
 
 #ifdef SDL_IPHONE_KEYBOARD
     SDLUITextField *textField;
-    BOOL hardwareKeyboard;
     BOOL showingKeyboard;
     BOOL hidingKeyboard;
     BOOL rotatingOrientation;
@@ -98,7 +97,6 @@ - (instancetype)initWithSDLWindow:(SDL_Window *)_window
 
 #ifdef SDL_IPHONE_KEYBOARD
         [self initKeyboard];
-        hardwareKeyboard = NO;
         showingKeyboard = NO;
         hidingKeyboard = NO;
         rotatingOrientation = NO;