[turbofan] remove redundant '& 0x1F' for shifts.

src/compiler/machine-operator-reducer.h

Index: src/compiler/machine-operator-reducer.h
diff --git a/src/compiler/machine-operator-reducer.h b/src/compiler/machine-operator-reducer.h
index fefac7a23916a9d0b9ae2aa4c6100af84a55f781..2973ab5e038dda1fe27f5ce49a9f462dd1176c43 100644
--- a/src/compiler/machine-operator-reducer.h
+++ b/src/compiler/machine-operator-reducer.h
@@ -68,6 +68,7 @@ class MachineOperatorReducer FINAL : public Reducer {
   Reduction ReduceTruncateFloat64ToInt32(Node* node);
   Reduction ReduceStore(Node* node);
   Reduction ReduceProjection(size_t index, Node* node);
+  Reduction ReduceWord32Shifts(Node* node);
 
   Graph* graph() const;
   JSGraph* jsgraph() const { return jsgraph_; }