map_remove($map, $keys...) 
Returns a new map with keys removed.
Like all map functions, map-merge() returns a new map rather than modifying its arguments in place.
  Examples: map-remove(("foo": 1, "bar": 2), "bar") => ("foo": 1)
map-remove(("foo": 1, "bar": 2, "baz": 3), "bar", "baz") => ("foo": 1)
map-remove(("foo": 1, "bar": 2), "baz") => ("foo": 1, "bar": 2)       Parameters:  $map (Map)   $keys ([Base])   Returns:  (Map)  Raises:  (ArgumentError) —  if $map is not a map