Remove unused import for Assume

Author: artembilan

spring-rabbit-junit/src/main/java/org/springframework/amqp/rabbit/junit/BrokerRunning.java

@@ -23,7 +23,6 @@
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
-import org.junit.Assume;
 import org.junit.rules.TestWatcher;
 import org.junit.runner.Description;
 import org.junit.runners.model.Statement;