Minor simplification in Node::previousNodeConsideringAtomicNodes.

Source/core/dom/Node.cpp

Index: Source/core/dom/Node.cpp
diff --git a/Source/core/dom/Node.cpp b/Source/core/dom/Node.cpp
index de1d4a50790fbef964e178edb3967bd097e03f1d..aa67a5ea3fc523d3fff4d823531b89ee4e66fac3 100644
--- a/Source/core/dom/Node.cpp
+++ b/Source/core/dom/Node.cpp
@@ -1006,10 +1006,7 @@ Node* Node::previousNodeConsideringAtomicNodes() const
             n = n->lastChild();
         return n;
     }
-    if (parentNode()) {
-        return parentNode();
-    }
-    return nullptr;
+    return parentNode();
 }
 
 Node* Node::nextNodeConsideringAtomicNodes() const