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()

app/src/main/java/eu/kanade/tachiyomi/ui/setting/track/AnilistLoginActivity.kt

@@ -2,7 +2,6 @@ package eu.kanade.tachiyomi.ui.setting.track
 
 import android.net.Uri
 import eu.kanade.tachiyomi.util.lang.launchIO
-import eu.kanade.tachiyomi.util.lang.launchUI
 
 class AnilistLoginActivity : BaseOAuthLoginActivity() {
 
@@ -12,9 +11,7 @@ class AnilistLoginActivity : BaseOAuthLoginActivity() {
         if (matchResult?.groups?.get(1) != null) {
             launchIO {
                 trackManager.aniList.login(matchResult.groups[1]!!.value)
-                launchUI {
-                    returnToSettings()
-                }
+                returnToSettings()
             }
         } else {
             trackManager.aniList.logout()

app/src/main/java/eu/kanade/tachiyomi/ui/setting/track/BangumiLoginActivity.kt

@@ -2,7 +2,6 @@ package eu.kanade.tachiyomi.ui.setting.track
 
 import android.net.Uri
 import eu.kanade.tachiyomi.util.lang.launchIO
-import eu.kanade.tachiyomi.util.lang.launchUI
 
 class BangumiLoginActivity : BaseOAuthLoginActivity() {
 
@@ -11,9 +10,7 @@ class BangumiLoginActivity : BaseOAuthLoginActivity() {
         if (code != null) {
             launchIO {
                 trackManager.bangumi.login(code)
-                launchUI {
-                    returnToSettings()
-                }
+                returnToSettings()
             }
         } else {
             trackManager.bangumi.logout()

app/src/main/java/eu/kanade/tachiyomi/ui/setting/track/MyAnimeListLoginActivity.kt

@@ -2,7 +2,6 @@ package eu.kanade.tachiyomi.ui.setting.track
 
 import android.net.Uri
 import eu.kanade.tachiyomi.util.lang.launchIO
-import eu.kanade.tachiyomi.util.lang.launchUI
 
 class MyAnimeListLoginActivity : BaseOAuthLoginActivity() {
 
@@ -11,9 +10,7 @@ class MyAnimeListLoginActivity : BaseOAuthLoginActivity() {
         if (code != null) {
             launchIO {
                 trackManager.myAnimeList.login(code)
-                launchUI {
-                    returnToSettings()
-                }
+                returnToSettings()
             }
         } else {
             trackManager.myAnimeList.logout()

app/src/main/java/eu/kanade/tachiyomi/ui/setting/track/ShikimoriLoginActivity.kt

@@ -2,7 +2,6 @@ package eu.kanade.tachiyomi.ui.setting.track
 
 import android.net.Uri
 import eu.kanade.tachiyomi.util.lang.launchIO
-import eu.kanade.tachiyomi.util.lang.launchUI
 
 class ShikimoriLoginActivity : BaseOAuthLoginActivity() {
 
@@ -11,9 +10,7 @@ class ShikimoriLoginActivity : BaseOAuthLoginActivity() {
         if (code != null) {
             launchIO {
                 trackManager.shikimori.login(code)
-                launchUI {
-                    returnToSettings()
-                }
+                returnToSettings()
             }
         } else {
             trackManager.shikimori.logout()

app/src/main/java/eu/kanade/tachiyomi/ui/setting/track/TrackLoginDialog.kt

@@ -45,16 +45,12 @@ class TrackLoginDialog(
         launchIO {
             try {
                 service.login(user, pass)
-                launchUI {
-                    dialog?.dismiss()
-                    view?.context?.toast(R.string.login_success)
-                }
+                dialog?.dismiss()
+                launchUI { view?.context?.toast(R.string.login_success) }
             } catch (e: Throwable) {
-                launchUI {
-                    binding!!.login.progress = -1
-                    binding!!.login.setText(R.string.unknown_error)
-                    e.message?.let { view?.context?.toast(it) }
-                }
+                binding?.login?.progress = -1
+                binding?.login?.setText(R.string.unknown_error)
+                launchUI { e.message?.let { view?.context?.toast(it) } }
             }
         }
     }