refactor(主界面): 移除冗余变量

- 移除MainActivity中未使用的userInfoNavGraph变量

app/src/main/java/com/grkj/iscs/features/main/activity/MainActivity.kt

@@ -38,7 +38,6 @@ import dagger.hilt.android.AndroidEntryPoint
 class MainActivity() : BaseActivity<ActivityMainBinding>() {
     private val viewModel: MainViewModel by viewModels()
     private var cardNo: String = ""
-    private var userInfoNavGraph = 0
     private val tabConfigs = listOf(
         TabConfig(
             View.generateViewId(),