style fix

Author: timfel

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/nodes/classes/AbstractObjectIsSubclassNode.java

@@ -44,7 +44,6 @@
 import com.oracle.truffle.api.dsl.NodeChild;
 import com.oracle.truffle.api.dsl.NodeChildren;
 import com.oracle.truffle.api.dsl.Specialization;
-import com.oracle.truffle.api.nodes.ExplodeLoop;
 import com.oracle.truffle.api.nodes.NodeInfo;
 
 @NodeInfo(shortName = "cpython://Objects/abstract.c/abstract_issubclass")