diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/DefaultCryptoService.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/DefaultCryptoService.kt
index bb629fd881..cf5506a443 100755
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/DefaultCryptoService.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/DefaultCryptoService.kt
@@ -21,7 +21,6 @@ package im.vector.matrix.android.internal.crypto
 import android.content.Context
 import android.os.Handler
 import android.os.Looper
-import arrow.core.Try
 import com.squareup.moshi.Types
 import com.zhuinden.monarchy.Monarchy
 import dagger.Lazy
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/keysbackup/KeysBackup.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/keysbackup/KeysBackup.kt
index e640e807c8..b3ee138591 100644
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/keysbackup/KeysBackup.kt
+++ b/matrix-sdk-android/src/main/java/im/vector/matrix/android/internal/crypto/keysbackup/KeysBackup.kt
@@ -21,7 +21,6 @@ import android.os.Looper
 import androidx.annotation.UiThread
 import androidx.annotation.VisibleForTesting
 import androidx.annotation.WorkerThread
-import arrow.core.Try
 import im.vector.matrix.android.api.MatrixCallback
 import im.vector.matrix.android.api.auth.data.Credentials
 import im.vector.matrix.android.api.failure.Failure
@@ -70,9 +69,6 @@ import org.matrix.olm.OlmPkMessage
 import timber.log.Timber
 import java.security.InvalidParameterException
 import javax.inject.Inject
-import kotlin.coroutines.resume
-import kotlin.coroutines.resumeWithException
-import kotlin.coroutines.suspendCoroutine
 import kotlin.random.Random
 
 /**