remove unused method

src/main/java/de/nilzbu/mytimetracker/service/TimeEntryService.java

@@ -23,10 +23,6 @@ public class TimeEntryService {
         return repository.findAllByUserOrderByDateDesc(user);
     }
 
-    public int getNumberOfEntriesForUser(User user) {
-        return getEntriesForUser(user).size();
-    }
-
     public TimeEntry save(TimeEntry entry) {
         return repository.save(entry);
     }