Remove redundant call in Editor::findEventTargetFrom

https://bugs.webkit.org/show_bug.cgi?id=271622

Reviewed by Sihui Liu.

This patch removes redundant call for returning `nullptr`, if there is
no target while in above `if`, it returns value properly, so this is
noop condition.

* Source/WebCore/editing/Editor.cpp:
(WebCore::Editor::findEventTargetFrom const):

Canonical link: https://commits.webkit.org/276641@main

Source/WebCore/editing/Editor.cpp

@@ -983,8 +983,6 @@ RefPtr<Element> Editor::findEventTargetFrom(const VisibleSelection& selection) c
     RefPtr target { selection.start().anchorElementAncestor() };
     if (!target)
         target = document().bodyOrFrameset();
-    if (!target)
-        return nullptr;
 
     return target;
 }