Revert "add select all role for macOS"

This reverts commit bab47f0f.

src/vs/platform/menubar/electron-main/menubar.ts

@@ -652,8 +652,6 @@ export class Menubar {
 				options['role'] = 'copy';
 			} else if (commandId === 'editor.action.clipboardPasteAction') {
 				options['role'] = 'paste';
-			} else if (commandId === 'editor.action.selectAll') {
-				options['role'] = 'selectAll';
 			}
 
 			// Add context aware click handlers for special case menu items