Remove some unnecessary coroutine dispatcher switching

app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaPresenter.kt

@@ -24,7 +24,6 @@ import eu.kanade.tachiyomi.util.isLocal
 import eu.kanade.tachiyomi.util.lang.await
 import eu.kanade.tachiyomi.util.lang.isNullOrUnsubscribed
 import eu.kanade.tachiyomi.util.lang.launchIO
-import eu.kanade.tachiyomi.util.lang.launchUI
 import eu.kanade.tachiyomi.util.prepUpdateCover
 import eu.kanade.tachiyomi.util.removeCovers
 import eu.kanade.tachiyomi.util.shouldDownloadNewChapters
@@ -511,9 +510,7 @@ class MangaPresenter(
                     refreshChapters()
                 }
 
-                launchUI {
-                    view?.onChaptersDeleted(chapters)
-                }
+                view?.onChaptersDeleted(chapters)
             } catch (e: Throwable) {
                 view?.onChaptersDeletedError(e)
             }

app/src/main/java/eu/kanade/tachiyomi/ui/manga/track/TrackPresenter.kt

@@ -114,12 +114,10 @@ class TrackPresenter(
             try {
                 service.update(track)
                 db.insertTrack(track).await()
-                launchUI {
-                    view!!.onRefreshDone()
-                }
+                view?.onRefreshDone()
             } catch (e: Throwable) {
                 launchUI {
-                    view!!.onRefreshError(e)
+                    view?.onRefreshError(e)
 
                     // Restart on error to set old values
                     fetchTrackings()