Remove unused environment variables from pipeline

[PlagueHO]

Pull Request (PR) description

This PR updates the pipeline to correct the last pipeline task and remove unused environment variables.

This Pull Request (PR) fixes the following issues

N/A

Task list

• Added an entry under the Unreleased section of the change log in the CHANGELOG.md.
  Entry should say what was changed, and how that affects users (if applicable).
• Resource documentation added/updated in README.md in resource folder.
• Resource parameter descriptions added/updated in 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 Resource Testing Guidelines.
• Integration tests added/updated (where possible). See DSC Resource Testing Guidelines.
• New/changed code adheres to DSC Resource Style Guidelines and Best Practices.

@johlju - would you mind reviewing when you have time?

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This change is 

[codecov]

Codecov Report

Merging #372 (02d0cf0) into main (e645c7e) will increase coverage by 2%.
The diff coverage is 86%.

@@         Coverage Diff          @@
##           main   #372    +/-   ##
====================================
+ Coverage    88%    90%    +2%     
====================================
  Files        14     17     +3     
  Lines      1469   1682   +213     
====================================
+ Hits       1294   1520   +226     
+ Misses      175    162    -13     

Impacted Files	Coverage Δ
...gementDsc.Common/ComputerManagementDsc.Common.psm1	39% <39%> (ø)
...Resources/DSC_ScheduledTask/DSC_ScheduledTask.psm1	86% <78%> (ø)
source/DSCResources/DSC_SmbShare/DSC_SmbShare.psm1	98% <92%> (ø)
...s/DSC_WindowsCapability/DSC_WindowsCapability.psm1	97% <95%> (ø)
...urces/DSC_WindowsEventLog/DSC_WindowsEventLog.psm1	96% <96%> (ø)
source/DSCResources/DSC_Computer/DSC_Computer.psm1	88% <100%> (ø)
...iguration/DSC_IEEnhancedSecurityConfiguration.psm1	100% <100%> (ø)
...s/DSC_OfflineDomainJoin/DSC_OfflineDomainJoin.psm1	89% <100%> (ø)
...Resources/DSC_PendingReboot/DSC_PendingReboot.psm1	98% <100%> (ø)
...urce/DSCResources/DSC_PowerPlan/DSC_PowerPlan.psm1	100% <100%> (ø)
... and 13 more

[johlju]

Reviewed 3 of 3 files at r1.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @PlagueHO)