chore: drop inputsystem from demo

Author: fadi-george

examples/demo/Packages/manifest.json

@@ -3,7 +3,6 @@
     "com.onesignal.unity.android": "file:../../../com.onesignal.unity.android",
     "com.onesignal.unity.core": "file:../../../com.onesignal.unity.core",
     "com.onesignal.unity.ios": "file:../../../com.onesignal.unity.ios",
-    "com.unity.inputsystem": "1.19.0",
     "com.unity.nuget.newtonsoft-json": "3.2.2",
     "com.unity.modules.accessibility": "1.0.0",
     "com.unity.modules.androidjni": "1.0.0",

examples/demo/Packages/packages-lock.json

@@ -30,15 +30,6 @@
         "com.unity.nuget.newtonsoft-json": "3.2.1"
       }
     },
-    "com.unity.inputsystem": {
-      "version": "1.19.0",
-      "depth": 0,
-      "source": "registry",
-      "dependencies": {
-        "com.unity.modules.uielements": "1.0.0"
-      },
-      "url": "https://packages.unity.com"
-    },
     "com.unity.nuget.newtonsoft-json": {
       "version": "3.2.2",
       "depth": 0,

examples/demo/ProjectSettings/ProjectSettings.asset

@@ -909,7 +909,7 @@ PlayerSettings:
   qnxGraphicConfPath: 
   apiCompatibilityLevel: 6
   captureStartupLogs: {}
-  activeInputHandler: 1
+  activeInputHandler: 0
   windowsGamepadBackendHint: 0
   enableDirectStorage: 0
   cloudProjectId: