Remove Buildpack Output module (#852)

CHANGELOG.md

@@ -9,6 +9,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Changed
+
+- `libherokubuildpack`:
+  - Removed `buildpack_output` module. This functionality from ([#721](https://github.com/heroku/libcnb.rs/pull/721)) was experimental. The API was not stable and it is being removed. A similar API is available at [bullet_stream](https://crates.io/crates/bullet_stream). ([#852](https://github.com/heroku/libcnb.rs/pull/852)
 
 ## [0.25.0] - 2024-10-23
 

libherokubuildpack/Cargo.toml

@@ -18,7 +18,7 @@ all-features = true
 workspace = true
 
 [features]
-default = ["command", "download", "digest", "error", "inventory", "log", "inventory-semver", "inventory-sha2", "tar", "toml", "fs", "write", "buildpack_output"]
+default = ["command", "download", "digest", "error", "inventory", "log", "inventory-semver", "inventory-sha2", "tar", "toml", "fs", "write"]
 download = ["dep:ureq", "dep:thiserror"]
 digest = ["dep:sha2"]
 error = ["log", "dep:libcnb"]
@@ -30,7 +30,6 @@ tar = ["dep:tar", "dep:flate2"]
 toml = ["dep:toml"]
 fs = ["dep:pathdiff"]
 command = ["write", "dep:crossbeam-utils"]
-buildpack_output = []
 write = []
 
 [dependencies]
@@ -54,7 +53,5 @@ toml = { workspace = true, optional = true }
 ureq = { version = "2.10.1", default-features = false, features = ["tls"], optional = true }
 
 [dev-dependencies]
-indoc = "2.0.5"
-libcnb-test = { workspace = true }
 serde_test = "1.0.177"
 tempfile = "3.13.0"

libherokubuildpack/README.md

@@ -4,8 +4,8 @@ Common utilities for buildpacks written with [libcnb.rs](https://github.com/hero
 only used for official Heroku buildpacks. It was moved into the libcnb.rs repository as an incubator for utilities that
 might find their way into libcnb.rs proper.
 
-This crate is optional and not required to write buildpacks with libcnb.rs. It provides helpers that buildpack authors 
-commonly need. Examples are digest generation, filesystem utilities, HTTP download helpers and tarball extraction. 
+This crate is optional and not required to write buildpacks with libcnb.rs. It provides helpers that buildpack authors
+commonly need. Examples are digest generation, filesystem utilities, HTTP download helpers and tarball extraction.
 
 ## Crate Features
 
@@ -30,8 +30,6 @@ The feature names line up with the modules in this crate. All features are enabl
   Enables inventory helpers to work with `sha2::Sha256` and `sha2::Sha512`.
 * `log` -
   Enables helpers for logging.
-* `buildpack_output` -
-  Enables helpers for user-facing buildpack output.
 * `tar` -
   Enables helpers for working with tarballs.
 * `toml` -