style fix

Author: timfel

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/PythonBuiltins.java

@@ -39,7 +39,6 @@
 import com.oracle.graal.python.builtins.objects.type.PythonBuiltinClass;
 import com.oracle.graal.python.nodes.function.BuiltinFunctionRootNode;
 import com.oracle.graal.python.nodes.function.PythonBuiltinBaseNode;
-import com.oracle.graal.python.builtins.Python3Core;
 import com.oracle.graal.python.util.BiConsumer;
 import com.oracle.truffle.api.RootCallTarget;
 import com.oracle.truffle.api.dsl.NodeFactory;