MemberAdminWindow: Add pending member movement export

Elwig/Helpers/Export/Ebics.cs

@@ -28,15 +28,6 @@ namespace Elwig.Helpers.Export {
             Writer.Dispose();
         }
 
-        public ValueTask DisposeAsync() {
-            GC.SuppressFinalize(this);
-            return Writer.DisposeAsync();
-        }
-
-        public void Export(IEnumerable<Transaction> transactions, IProgress<double>? progress = null) {
-            ExportAsync(transactions, progress).GetAwaiter().GetResult();
-        }
-
         public async Task ExportAsync(IEnumerable<Transaction> transactions, IProgress<double>? progress = null) {
             if (transactions.Any(tx => tx.Amount < 0)) {
                 throw new ArgumentException("Tranaction amount may not be negative");