Document opaque types

Closes https://github.com/gleam-lang/language-tour/issues/63

1 files changed, 0 insertions, 17 deletions

diff --git a/src/content/chapter5_advanced_features/lesson05_externals/code.gleam b/src/content/chapter5_advanced_features/lesson05_externals/code.gleam
deleted file mode 100644
index 1101b82..0000000
--- a/src/content/chapter5_advanced_features/lesson05_externals/code.gleam
+++ /dev/null
@@ -1,17 +0,0 @@
-import gleam/io
-
-// A type with no Gleam constructors
-pub type DateTime
-
-// An external function that creates an instance of the type
-@external(javascript, "./my_package_ffi.mjs", "now")
-pub fn now() -> DateTime
-
-// The `now` function in `./my_package_ffi.mjs` looks like this:
-// export function now() {
-//   return new Date();
-// }
-
-pub fn main() {
-  io.debug(now())
-}