simplify

Author: scivision

+stdlib/get_permissions.m

@@ -13,20 +13,20 @@
   file (1,1) string
 end
 
-perm = '';
-b = '';
 
-if stdlib.exists(file)
-  try
-    perm = perm2char(filePermissions(file));
-    b = 'native';
-  catch e
-    if e.identifier ~= "MATLAB:UndefinedFunction"
+try
+  perm = perm2char(filePermissions(file));
+  b = 'native';
+catch e
+  switch e.identifier
+    case 'MATLAB:UndefinedFunction'
+      perm = perm2char(stdlib.legacy.file_attributes(file));
+      b = 'legacy';
+    case 'MATLAB:io:filesystem:filePermissions:CannotFindLocation'
+      perm = '';
+      b = '';
+    otherwise
       rethrow(e)
-    end
-
-    perm = perm2char(stdlib.legacy.file_attributes(file));
-    b = 'legacy';
   end
 end