Remove EmacsOpenPanel and EmacsSavePanel (bug#38031)

src/nsfns.m

@@ -1622,7 +1622,7 @@ Frames are listed from topmost (first) to bottommost (last).  */)
     dirS = [dirS stringByExpandingTildeInPath];
 
   panel = isSave ?
-    (id)[EmacsSavePanel savePanel] : (id)[EmacsOpenPanel openPanel];
+    (id)[NSSavePanel savePanel] : (id)[NSOpenPanel openPanel];
 
   [panel setTitle: promptS];
 
@@ -3077,29 +3077,6 @@ The position is returned as a cons cell (X . Y) of the
   return ret;
 }
 
-@implementation EmacsSavePanel
-- (BOOL)performKeyEquivalent:(NSEvent *)theEvent
-{
-  BOOL ret = handlePanelKeys (self, theEvent);
-  if (! ret)
-    ret = [super performKeyEquivalent:theEvent];
-  return ret;
-}
-@end
-
-
-@implementation EmacsOpenPanel
-- (BOOL)performKeyEquivalent:(NSEvent *)theEvent
-{
-  // NSOpenPanel inherits NSSavePanel, so passing self is OK.
-  BOOL ret = handlePanelKeys (self, theEvent);
-  if (! ret)
-    ret = [super performKeyEquivalent:theEvent];
-  return ret;
-}
-@end
-
-
 @implementation EmacsFileDelegate
 /* --------------------------------------------------------------------------
    Delegate methods for Open/Save panels

src/nsterm.h

@@ -595,22 +595,6 @@ typedef id instancetype;
 @end
 
 
-/* ==========================================================================
-
-   File open/save panels
-   This and next override methods to handle keyboard input in panels.
-
-   ========================================================================== */
-
-@interface EmacsSavePanel : NSSavePanel
-{
-}
-@end
-@interface EmacsOpenPanel : NSOpenPanel
-{
-}
-@end
-
 @interface EmacsFileDelegate : NSObject
 {
 }