DATAREDIS-1212 - Remove redundant null-check in RedisKeyValueAdapter.

Original pull request: #559.

Author: theigl

src/main/java/org/springframework/data/redis/core/RedisKeyValueAdapter.java

@@ -798,7 +798,7 @@ public void onMessage(Message message, @Nullable byte[] pattern) {
 
 		private boolean isKeyExpirationMessage(Message message) {
 
-			if (message == null || message.getChannel() == null || message.getBody() == null) {
+			if (message == null) {
 				return false;
 			}