clean up toolbar dropdown arrow logic

since its no longer used

app/src/main/java/eu/kanade/tachiyomi/ui/base/BaseToolbar.kt

@@ -18,7 +18,6 @@ open class BaseToolbar @JvmOverloads constructor(context: Context, attrs: Attrib
     protected val titleTextAppeance: Int
 
     var incognito = false
-    var hasDropdown: Boolean? = null
     init {
         val a = context.obtainStyledAttributes(
             attrs,
@@ -42,22 +41,9 @@ open class BaseToolbar @JvmOverloads constructor(context: Context, attrs: Attrib
         toolbarTitle.isVisible = true
         toolbarTitle.text = title
         super.setTitle(null)
-        if (navigationIcon is DrawerArrowDrawable) {
-            hideDropdown()
-        }
         setIncognitoMode(incognito)
     }
 
-    fun hideDropdown() {
-        hasDropdown = null
-        setIcons()
-    }
-
-    fun showDropdown(down: Boolean = true) {
-        hasDropdown = down
-        setIcons()
-    }
-
     fun setIncognitoMode(enabled: Boolean) {
         incognito = enabled
         setIcons()
@@ -76,7 +62,6 @@ open class BaseToolbar @JvmOverloads constructor(context: Context, attrs: Attrib
     private fun getIncogRes(): Int {
         return when {
             incognito -> R.drawable.ic_incognito_circle_24dp
-            hasDropdown != null -> R.drawable.ic_blank_24dp
             else -> 0
         }
     }
@@ -84,8 +69,6 @@ open class BaseToolbar @JvmOverloads constructor(context: Context, attrs: Attrib
     @DrawableRes
     private fun getDropdownRes(): Int {
         return when {
-            hasDropdown == true -> R.drawable.ic_arrow_drop_down_24dp
-            hasDropdown == false -> R.drawable.ic_arrow_drop_up_24dp
             incognito && navigationIcon !is DrawerArrowDrawable -> R.drawable.ic_blank_28dp
             else -> 0
         }

app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryController.kt

@@ -856,7 +856,6 @@ class LibraryController(
             binding.recyclerCover.isClickable = false
             binding.recyclerCover.isFocusable = false
             singleCategory = presenter.categories.size <= 1
-            showDropdown()
 
             if (preferences.showLibrarySearchSuggestions().get()) {
                 activityBinding?.cardToolbar?.setOnLongClickListener {
@@ -880,18 +879,10 @@ class LibraryController(
             if (binding.filterBottomSheet.filterBottomSheet.sheetBehavior.isHidden()) {
                 binding.filterBottomSheet.filterBottomSheet.isInvisible = true
             }
-            activityBinding?.toolbar?.hideDropdown()
             activityBinding?.cardToolbar?.setOnLongClickListener(null)
         }
     }
 
-    override fun onChangeEnded(handler: ControllerChangeHandler, type: ControllerChangeType) {
-        super.onChangeEnded(handler, type)
-        if (!type.isEnter) {
-            activityBinding?.toolbar?.hideDropdown()
-        }
-    }
-
     override fun onActivityResumed(activity: Activity) {
         super.onActivityResumed(activity)
         if (!isBindingInitialized) return
@@ -931,7 +922,6 @@ class LibraryController(
         }
         adapter.setItems(mangaMap)
         singleCategory = presenter.categories.size <= 1
-        showDropdown()
         binding.progress.isVisible = false
         if (!freshStart) {
             justStarted = false
@@ -975,16 +965,6 @@ class LibraryController(
         }
     }
 
-    private fun showDropdown() {
-        if (onRoot) {
-            if (!singleCategory) {
-                activityBinding?.toolbar?.showDropdown()
-            } else {
-                activityBinding?.toolbar?.hideDropdown()
-            }
-        }
-    }
-
     private fun showSlideAnimation() {
         isAnimatingHopper = true
         val slide = 25f.dpToPx
@@ -1032,7 +1012,6 @@ class LibraryController(
         binding.recyclerCover.animate().translationY(translateY).start()
         binding.recyclerCover.animate().alpha(if (show) 0.75f else 0f).start()
         binding.libraryGridRecycler.recycler.suppressLayout(show)
-        activityBinding?.toolbar?.showDropdown(!show)
         binding.swipeRefresh.isEnabled = !show
         setSubtitle()
         if (show) {