Get rid of redundant member function PositionAlgorithm<Strategy>::{upstream,downstream}

Source/core/editing/Position.cpp

Index: Source/core/editing/Position.cpp
diff --git a/Source/core/editing/Position.cpp b/Source/core/editing/Position.cpp
index 0f108c1f930349d51c83b3c2d61be6cdb82eef1f..4e563ced8f6c902f0a6d845938e18a98c05a7e16 100644
--- a/Source/core/editing/Position.cpp
+++ b/Source/core/editing/Position.cpp
@@ -467,18 +467,6 @@ bool PositionAlgorithm<Strategy>::atEndOfTree() const
 }
 
 template <typename Strategy>
-PositionAlgorithm<Strategy> PositionAlgorithm<Strategy>::upstream(EditingBoundaryCrossingRule rule) const
-{
-    return mostBackwardCaretPosition(*this, rule);
-}
-
-template <typename Strategy>
-PositionAlgorithm<Strategy> PositionAlgorithm<Strategy>::downstream(EditingBoundaryCrossingRule rule) const
-{
-    return mostForwardCaretPosition(*this, rule);
-}
-
-template <typename Strategy>
 void PositionAlgorithm<Strategy>::debugPosition(const char* msg) const
 {
     static const char* const anchorTypes[] = {