Remove extra semicolons in Objective-C code.

The semicolons after the method signature in its implementation are useless
and, in fact, provoke warnings from the compiler used by Xcode 4. Simply
remove them.

See #12927.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@66973 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/osx/cocoa/notebook.mm

@@ -66,8 +66,7 @@
     return YES;
 }
 
-- (void)tabView:(NSTabView *)tabView didSelectTabViewItem:(NSTabViewItem *)tabViewItem;
-
+- (void)tabView:(NSTabView *)tabView didSelectTabViewItem:(NSTabViewItem *)tabViewItem
 {
     wxUnusedVar(tabViewItem);
     wxNSTabView* view = (wxNSTabView*) tabView;