fix style problems

Author: timfel

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

@@ -84,8 +84,8 @@
 import com.oracle.graal.python.builtins.modules.TruffleCextBuiltins;
 import com.oracle.graal.python.builtins.modules.UnicodeDataModuleBuiltins;
 import com.oracle.graal.python.builtins.modules.WeakRefModuleBuiltins;
-import com.oracle.graal.python.builtins.modules.ZipImportModuleBuiltins;
 import com.oracle.graal.python.builtins.modules.ZLibModuleBuiltins;
+import com.oracle.graal.python.builtins.modules.ZipImportModuleBuiltins;
 import com.oracle.graal.python.builtins.objects.array.ArrayBuiltins;
 import com.oracle.graal.python.builtins.objects.bool.BoolBuiltins;
 import com.oracle.graal.python.builtins.objects.bytes.AbstractBytesBuiltins;
@@ -131,7 +131,6 @@
 import com.oracle.graal.python.builtins.objects.method.ClassmethodBuiltins;
 import com.oracle.graal.python.builtins.objects.method.DecoratedMethodBuiltins;
 import com.oracle.graal.python.builtins.objects.method.MethodBuiltins;
-import com.oracle.graal.python.builtins.objects.method.PBuiltinMethod;
 import com.oracle.graal.python.builtins.objects.method.StaticmethodBuiltins;
 import com.oracle.graal.python.builtins.objects.module.PythonModule;
 import com.oracle.graal.python.builtins.objects.object.ObjectBuiltins;
@@ -156,7 +155,6 @@
 import com.oracle.graal.python.builtins.objects.type.PythonClass;
 import com.oracle.graal.python.builtins.objects.type.TypeBuiltins;
 import com.oracle.graal.python.builtins.objects.zipimporter.ZipImporterBuiltins;
-import com.oracle.graal.python.nodes.SpecialAttributeNames;
 import com.oracle.graal.python.runtime.PythonContext;
 import com.oracle.graal.python.runtime.PythonCore;
 import com.oracle.graal.python.runtime.PythonOptions;