Fix spotless

app/src/main/kotlin/com/hippo/ehviewer/ui/MainActivity.kt

@@ -56,7 +56,6 @@ import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.viewinterop.AndroidViewBinding
 import androidx.core.splashscreen.SplashScreen.Companion.installSplashScreen
-import androidx.core.view.WindowCompat
 import androidx.lifecycle.lifecycleScope
 import androidx.navigation.NavController
 import androidx.navigation.fragment.NavHostFragment