Remove a couple of Cocoa examples that have unfortunately been

rendered obsolete because Apple has removed the ability to use
IB to define classes without an Objective-C (or Swift, I suppose)
source file.

.gitattributes

@@ -143,56 +143,6 @@ doc/manual/using.ccldoc -text
 doc/release-notes-1.2.txt -text
 doc/release-notes.txt -text
 examples/android/native-activity.lisp -text
-examples/cocoa/currency-converter/CurrencyConverter.nib/designable.nib -text
-examples/cocoa/currency-converter/CurrencyConverter.nib/keyedobjects.nib -text
-examples/cocoa/currency-converter/HOWTO.html -text
-examples/cocoa/currency-converter/HOWTO_files/images/bosco.jpg -text
-examples/cocoa/currency-converter/HOWTO_files/images/cc1.jpg -text
-examples/cocoa/currency-converter/HOWTO_files/images/cc2.jpg -text
-examples/cocoa/currency-converter/HOWTO_files/images/finder-win1.jpg -text
-examples/cocoa/currency-converter/HOWTO_files/images/finder-win2.jpg -text
-examples/cocoa/currency-converter/HOWTO_files/images/ibwin-leopard1.jpg -text
-examples/cocoa/currency-converter/HOWTO_files/images/ibwin-leopard2.jpg -text
-examples/cocoa/currency-converter/HOWTO_files/images/ibwin-leopard3.jpg -text
-examples/cocoa/currency-converter/HOWTO_files/images/ibwin-leopard4.jpg -text
-examples/cocoa/currency-converter/HOWTO_files/images/ibwin-leopard5.jpg -text
-examples/cocoa/currency-converter/HOWTO_files/images/ibwin-leopard6.jpg -text
-examples/cocoa/currency-converter/HOWTO_files/images/ibwin-leopard7.jpg -text
-examples/cocoa/currency-converter/HOWTO_files/images/ibwin-leopard8.jpg -text
-examples/cocoa/currency-converter/HOWTO_files/images/ibwin-tiger1.jpg -text
-examples/cocoa/currency-converter/HOWTO_files/images/ibwin-tiger10.jpg -text
-examples/cocoa/currency-converter/HOWTO_files/images/ibwin-tiger11.jpg -text
-examples/cocoa/currency-converter/HOWTO_files/images/ibwin-tiger12.jpg -text
-examples/cocoa/currency-converter/HOWTO_files/images/ibwin-tiger13.jpg -text
-examples/cocoa/currency-converter/HOWTO_files/images/ibwin-tiger14.jpg -text
-examples/cocoa/currency-converter/HOWTO_files/images/ibwin-tiger15.jpg -text
-examples/cocoa/currency-converter/HOWTO_files/images/ibwin-tiger16.jpg -text
-examples/cocoa/currency-converter/HOWTO_files/images/ibwin-tiger17.jpg -text
-examples/cocoa/currency-converter/HOWTO_files/images/ibwin-tiger18.jpg -text
-examples/cocoa/currency-converter/HOWTO_files/images/ibwin-tiger19.jpg -text
-examples/cocoa/currency-converter/HOWTO_files/images/ibwin-tiger2.jpg -text
-examples/cocoa/currency-converter/HOWTO_files/images/ibwin-tiger20.jpg -text
-examples/cocoa/currency-converter/HOWTO_files/images/ibwin-tiger21.jpg -text
-examples/cocoa/currency-converter/HOWTO_files/images/ibwin-tiger22.jpg -text
-examples/cocoa/currency-converter/HOWTO_files/images/ibwin-tiger3.jpg -text
-examples/cocoa/currency-converter/HOWTO_files/images/ibwin-tiger4.jpg -text
-examples/cocoa/currency-converter/HOWTO_files/images/ibwin-tiger5.jpg -text
-examples/cocoa/currency-converter/HOWTO_files/images/ibwin-tiger6.jpg -text
-examples/cocoa/currency-converter/HOWTO_files/images/ibwin-tiger7.jpg -text
-examples/cocoa/currency-converter/HOWTO_files/images/ibwin-tiger8.jpg -text
-examples/cocoa/currency-converter/HOWTO_files/images/ibwin-tiger9.jpg -text
-examples/cocoa/currency-converter/HOWTO_files/images/ibwin1.jpg -text
-examples/cocoa/currency-converter/HOWTO_files/images/listener1.jpg -text
-examples/cocoa/currency-converter/HOWTO_files/images/term1.jpg -text
-examples/cocoa/currency-converter/HOWTO_files/pages/build_app.html -text
-examples/cocoa/currency-converter/HOWTO_files/pages/building_ui.html -text
-examples/cocoa/currency-converter/HOWTO_files/pages/building_ui_tiger.html -text
-examples/cocoa/currency-converter/HOWTO_files/pages/conclusion.html -text
-examples/cocoa/currency-converter/HOWTO_files/pages/create_lisp.html -text
-examples/cocoa/currency-converter/HOWTO_files/pages/making_project.html -text
-examples/cocoa/currency-converter/HOWTO_files/pages/writing_lisp.html -text
-examples/cocoa/currency-converter/HOWTO_files/stylesheets/styles.css -text
-examples/cocoa/currency-converter/currency-converter.lisp -text
 examples/cocoa/easygui.lisp -text
 examples/cocoa/easygui/action-targets.lisp -text
 examples/cocoa/easygui/dialogs.lisp -text
@@ -208,12 +158,6 @@ examples/cocoa/easygui/views.lisp -text
 examples/cocoa/interface-databases/HOWTO.html -text
 examples/cocoa/interface-databases/HOWTO_files/images/bosco.jpg -text
 examples/cocoa/interface-databases/HOWTO_files/stylesheets/styles.css -text
-examples/cocoa/nib-loading/HOWTO.html -text
-examples/cocoa/nib-loading/HOWTO_files/images/bosco.jpg -text
-examples/cocoa/nib-loading/HOWTO_files/stylesheets/styles.css -text
-examples/cocoa/nib-loading/hello.nib/designable.nib -text
-examples/cocoa/nib-loading/hello.nib/keyedobjects.nib -text
-examples/cocoa/nib-loading/nib-loading.lisp -text
 examples/cocoa/progress-view-controller/progress-view-controller.lisp -text
 examples/cocoa/qtvidcapture/QTVidCapture.nib/classes.nib -text
 examples/cocoa/qtvidcapture/QTVidCapture.nib/info.nib -text