Move a static member function nodeIsUserSelectNone() out from PositionAlgorithm template class

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 5c458e5eba619acdeee2e3329262443a45c3765e..e33214921a5a90949b8b167195ad72b44ed455f1 100644
--- a/Source/core/editing/Position.cpp
+++ b/Source/core/editing/Position.cpp
@@ -820,12 +820,6 @@ bool PositionAlgorithm<Strategy>::hasRenderedNonAnonymousDescendantsWithHeight(L
 }
 
 template <typename Strategy>
-bool PositionAlgorithm<Strategy>::nodeIsUserSelectNone(Node* node)
-{
-    return node && node->layoutObject() && !node->layoutObject()->isSelectable();
-}
-
-template <typename Strategy>
 bool PositionAlgorithm<Strategy>::nodeIsUserSelectAll(const Node* node)
 {
     return RuntimeEnabledFeatures::userSelectAllEnabled() && node && node->layoutObject() && node->layoutObject()->style()->userSelect() == SELECT_ALL;