Remove debug print

lib/src/usage_impl.dart

diff --git a/lib/src/usage_impl.dart b/lib/src/usage_impl.dart
index daaff98..3e850ec 100644
--- a/lib/src/usage_impl.dart
+++ b/lib/src/usage_impl.dart
@@ -272,7 +272,6 @@
     if (_batchedEvents.length >= _maxHitsPerBatch ||
         _batchedEvents.fold<int>(0, (s, e) => s + e.length) >=
             _maxBytesPerBatch) {
-      print("full $_batchedEvents");
       _trySendBatches(completer);
     } else if (!_isSendingScheduled) {
       _isSendingScheduled = true;