diff --git a/app/src/main/java/eu/faircode/email/ServiceSynchronize.java b/app/src/main/java/eu/faircode/email/ServiceSynchronize.java
index 4fe7b58380..d06c689f82 100644
--- a/app/src/main/java/eu/faircode/email/ServiceSynchronize.java
+++ b/app/src/main/java/eu/faircode/email/ServiceSynchronize.java
@@ -67,7 +67,6 @@ import java.util.Map;
 import java.util.Properties;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
-import java.util.concurrent.Semaphore;
 
 import javax.mail.Address;
 import javax.mail.FetchProfile;
@@ -1552,17 +1551,6 @@ public class ServiceSynchronize extends LifecycleService {
             }
     }
 
-    private static void acquire(Semaphore semaphore, String name) {
-        boolean acquired = false;
-        while (!acquired)
-            try {
-                semaphore.acquire();
-                acquired = true;
-            } catch (InterruptedException ex) {
-                Log.e(Helper.TAG, name + " acquire " + ex.toString());
-            }
-    }
-
     public static void start(Context context) {
         ContextCompat.startForegroundService(context,
                 new Intent(context, ServiceSynchronize.class));