Update changelog.md

Author: ca-johnson

changelog.md

@@ -1,27 +1,7 @@
 # Changelog
 
-## v0.4.1
-
-### v0.4.1 Removed
-
-- Removed `checkout`, same reason as `command`.
-
 ## v0.4.0
 
-### v0.4.0 Fixed
-
-- Allow multiple steps to use metahooks for the same hook but with different content.
-- Inject `bash` shebang and Bash Strict Mode (`set -euo pipefail`) so that if metahooks fail with errors the job halts rather than continuing.
-
-  Bash Strict Mode is provided by
-  - `set -o errexit` - halt on error
-  - `set -o nounset` - halt if variable is unset
-  - `set -o pipefail` - halt if a command inside a pipe fails
-
-  You can override those choices by setting different values (e.g. `set +o nounset`) within your metahook.
-
-### v0.4.0 Removed
-
 - **Breaking change** Removed support for `command` metahook.
 
     Buildkite special-cases this which triggers edge-cases that a `command` metahook would need to work around.