#670 - Remove @EntityConcurrencyMode ... this is now rather redundant since 4.x changes

src/main/java/com/avaje/ebeaninternal/api/ConcurrencyMode.java

@@ -0,0 +1,17 @@
+package com.avaje.ebeaninternal.api;
+
+/**
+ * Optimistic concurrency mode used for updates and deletes.
+ */
+public enum ConcurrencyMode {
+
+	/**
+	 * No concurrency checking.
+	 */
+	NONE,
+	
+	/**
+	 * Use a version column.
+	 */
+	VERSION
+}