remove unused import

Author: Theo van Kraay

src/main/java/com/azure/cosmos/examples/changefeed/SampleChangeFeedProcessor.java

@@ -22,7 +22,6 @@
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
-import com.fasterxml.jackson.module.afterburner.asm.Opcodes;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;