Remove pipeline file no longer required

[johlju]

Pull Request (PR) description

• ActiveDirectoryDsc
  • There was a 'build.ps1' file under the source folder than are no longer required for ModuleBuilder to work.

This Pull Request (PR) fixes the following issues

None.

Task list

• [x] Added an entry to the change log under the Unreleased section of the file CHANGELOG.md. Entry should say what was changed and how that affects users (if applicable), and reference the issue being resolved (if applicable).
• [ ] Resource documentation added/updated in README.md.
• [ ] Resource parameter descriptions added/updated in README.md, schema.mof and comment-based help.
• [ ] Comment-based help added/updated.
• [ ] Localization strings added/updated in all localization files as appropriate.
• [ ] Examples appropriately added/updated.
• [ ] Unit tests added/updated. See DSC Community Testing Guidelines.
• [ ] Integration tests added/updated (where possible). See DSC Community Testing Guidelines.
• [ ] New/changed code adheres to DSC Community Style Guidelines.

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This change is 

[codecov[bot]]

Codecov Report

Merging #687 (a7ea147) into main (3a48b72) will not change coverage. The diff coverage is n/a.

@@         Coverage Diff         @@
##           main   #687   +/-   ##
===================================
  Coverage    97%    97%           
===================================
  Files        25     25           
  Lines      3433   3433           
===================================
  Hits       3364   3364           
  Misses       69     69