Fix compilation errors.

Author: fangerer

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/modules/BuiltinConstructors.java

@@ -25,6 +25,7 @@
  */
 package com.oracle.graal.python.builtins.modules;
 
+import static com.oracle.graal.python.builtins.objects.slice.PSlice.MISSING_INDEX;
 import static com.oracle.graal.python.nodes.BuiltinNames.BOOL;
 import static com.oracle.graal.python.nodes.BuiltinNames.BYTEARRAY;
 import static com.oracle.graal.python.nodes.BuiltinNames.BYTES;
@@ -1983,17 +1984,17 @@ Object call(Object klsas, Object set, Object get, Object name, Object owner) {
     public abstract static class CreateSliceNode extends PythonBuiltinNode {
         @Specialization(guards = "isNoValue(second)")
         Object sliceStop(PythonClass cls, int first, PNone second, PNone third) {
-            return factory().createSlice(PSlice.MISSING_INDEX, first, PSlice.MISSING_INDEX);
+            return factory().createSlice(MISSING_INDEX, first, MISSING_INDEX);
         }
 
         @Specialization(guards = "isNone(second)")
         Object sliceStart(PythonClass cls, int first, PNone second, PNone third) {
-            return factory().createSlice(first, PSlice.MISSING_INDEX, PSlice.MISSING_INDEX);
+            return factory().createSlice(first, MISSING_INDEX, MISSING_INDEX);
         }
 
         @Specialization(guards = "isNoValue(third)")
         Object slice(PythonClass cls, int first, int second, PNone third) {
-            return factory().createSlice(first, second, PSlice.MISSING_INDEX);
+            return factory().createSlice(first, second, MISSING_INDEX);
         }
 
         @Specialization

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/list/ListBuiltins.java

@@ -84,7 +84,6 @@
 import com.oracle.graal.python.nodes.function.builtins.PythonTernaryBuiltinNode;
 import com.oracle.graal.python.nodes.function.builtins.PythonUnaryBuiltinNode;
 import com.oracle.graal.python.nodes.truffle.PythonArithmeticTypes;
-import com.oracle.graal.python.nodes.util.CastToIndexNode;
 import com.oracle.graal.python.runtime.exception.PException;
 import com.oracle.graal.python.runtime.exception.PythonErrorType;
 import com.oracle.graal.python.runtime.sequence.PSequence;