removed gson internal import

Author: chillaq

client/src/main/java/io/split/client/events/EventsSender.java

@@ -12,7 +12,7 @@
 import java.net.URISyntaxException;
 import java.util.List;
 
-import static com.google.gson.internal.GsonPreconditions.checkNotNull;
+import static com.google.common.base.Preconditions.checkNotNull;
 
 public class EventsSender {
 

client/src/main/java/io/split/client/events/InMemoryEventsStorage.java

@@ -12,7 +12,7 @@
 import java.util.concurrent.BlockingQueue;
 import java.util.concurrent.LinkedBlockingQueue;
 
-import static com.google.gson.internal.GsonPreconditions.checkNotNull;
+import static com.google.common.base.Preconditions.checkNotNull;
 
 public class InMemoryEventsStorage implements EventsStorage{