Removed obsolete instruction. Fixed another instruction.

_pages/software_instructions.md

@@ -106,7 +106,7 @@ What follows are the steps I use to upload the software page.
 6. create a new release file called `_software/${project}-${tag}/release.md`
    and add the following. If it is not a Python project
    you must omit the `software_name_python_module` variable.
-   Add the `### Added`, `### Removed`, etc... contents if applicable.
+   Add the `### Added`, `### Removed`, etc... (changelog) contents if applicable.
 
    ```yaml
    ---
@@ -135,10 +135,6 @@ What follows are the steps I use to upload the software page.
    ...
    ```
 
-7. in `./_software/CHANGELOG-${project}.md` update the front matter with the appropriate data:
-
-   - `last_version` must correspond to `${tag}`
-
 ### Download (what you have to do)
 
 Run the following to download and verify the software.