Remove deprecated SyncWorkerManager.syncAuthorities

app/src/main/kotlin/at/bitfire/davdroid/sync/worker/SyncWorkerManager.kt

@@ -24,7 +24,6 @@ import androidx.work.WorkInfo
 import androidx.work.WorkManager
 import androidx.work.WorkQuery
 import androidx.work.WorkRequest
-import at.bitfire.davdroid.R
 import at.bitfire.davdroid.push.PushNotificationManager
 import at.bitfire.davdroid.sync.SyncDataType
 import at.bitfire.davdroid.sync.TasksAppManager
@@ -284,30 +283,4 @@ class SyncWorkerManager @Inject constructor(
             }
     }
 
-    /**
-     * Returns a list of all available sync authorities:
-     *
-     *   1. calendar authority
-     *   2. address books authority
-     *   3. current tasks authority (if available)
-     *
-     * Checking the availability of authorities may be relatively expensive, so the
-     * result should be cached for the current operation.
-     *
-     * @return list of available sync authorities for DAVx5 accounts
-     */
-    @Deprecated("Use SyncDataType.entries instead")
-    fun syncAuthorities(): List<String> {
-        val result = mutableListOf(
-            CalendarContract.AUTHORITY,
-            context.getString(R.string.address_books_authority)
-        )
-
-        tasksAppManager.get().currentProvider()?.let { taskProvider ->
-            result += taskProvider.authority
-        }
-
-        return result
-    }
-
 }