Revert "Use circle mask for thumb in new updates notification"

This reverts commit 8ff4eb26

app/src/main/java/org/koitharu/kotatsu/tracker/work/TrackWorker.kt

@@ -13,7 +13,6 @@ import androidx.lifecycle.map
 import androidx.work.*
 import coil.ImageLoader
 import coil.request.ImageRequest
-import coil.transform.CircleCropTransformation
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
 import org.koin.core.component.KoinComponent
@@ -160,7 +159,6 @@ class TrackWorker(context: Context, workerParams: WorkerParameters) :
 				coil.execute(
 					ImageRequest.Builder(applicationContext)
 						.data(manga.coverUrl)
-						.transformations(CircleCropTransformation())
 						.build()
 				).toBitmapOrNull()
 			)