scouting: remove unused DuckChat dependency

Author: mikescamell

app/src/main/java/com/duckduckgo/app/browser/BrowserViewModel.kt

@@ -68,7 +68,6 @@ import com.duckduckgo.common.utils.DispatcherProvider
 import com.duckduckgo.common.utils.SingleLiveEvent
 import com.duckduckgo.di.scopes.ActivityScope
 import com.duckduckgo.di.scopes.AppScope
-import com.duckduckgo.duckchat.api.DuckChat
 import com.duckduckgo.feature.toggles.api.Toggle
 import com.duckduckgo.feature.toggles.api.Toggle.DefaultFeatureValue
 import kotlinx.coroutines.CoroutineScope
@@ -102,7 +101,6 @@ class BrowserViewModel @Inject constructor(
     private val showOnAppLaunchOptionHandler: ShowOnAppLaunchOptionHandler,
     private val additionalDefaultBrowserPrompts: AdditionalDefaultBrowserPrompts,
     private val swipingTabsFeature: SwipingTabsFeatureProvider,
-    private val duckChat: DuckChat,
 ) : ViewModel(), CoroutineScope {
 
     override val coroutineContext: CoroutineContext