Do not mirror needsNewWebView in window controller

Frameworks/HTMLOutputWindow/src/HTMLOutputWindow.h

@@ -4,7 +4,6 @@
 PUBLIC @interface HTMLOutputWindowController : NSObject <NSWindowDelegate>
 @property (nonatomic) NSWindow* window;
 @property (nonatomic) OakHTMLOutputView* htmlOutputView;
-@property (nonatomic, readonly) BOOL needsNewWebView;
 
 - (instancetype)initWithIdentifier:(NSUUID*)anIdentifier;
 - (void)showWindow:(id)sender;

Frameworks/HTMLOutputWindow/src/HTMLOutputWindow.mm

@@ -75,11 +75,6 @@ OAK_DEBUG_VAR(HTMLOutputWindow);
 	[self.window close];
 }
 
-- (BOOL)needsNewWebView
-{
-	return _htmlOutputView.needsNewWebView;
-}
-
 - (BOOL)windowShouldClose:(id)sender
 {
 	D(DBF_HTMLOutputWindow, bug("\n"););