remove unused import

Author: timfel

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/Python3Core.java

@@ -148,7 +148,6 @@
 import com.oracle.truffle.api.TruffleFile;
 import com.oracle.truffle.api.TruffleOptions;
 import com.oracle.truffle.api.TruffleLanguage.Env;
-import com.oracle.truffle.api.TruffleOptions;
 import com.oracle.truffle.api.nodes.Node;
 import com.oracle.truffle.api.nodes.RootNode;
 import com.oracle.truffle.api.source.Source;