remove build-system env which is now set via cmsBuild

[smuzaffar]

cmsBuild now sets the build-system env o control the parallel jobs to run. This is useful for pypi based packages wheresome times we do not have control over the backend which runs the build system commands.

Thsi PR proposes to drop these env from cmsdist as these are now set by cmsBuild

[smuzaffar]

please test

[cmsbuild]

A new Pull Request was created by @smuzaffar for branch IB/CMSSW_16_1_X/master.

@akritkbehera, @iarspider, @raoatifshad, @smuzaffar can you please review it and eventually sign? Thanks.
@ftenchini, @mandrenguyen, @sextonkennedy you are the release manager for this.
cms-bot commands are listed here

[cmsbuild]

cms-bot internal usage

[cmsbuild]

Pull request #10414 was updated.

[smuzaffar]

please test

[smuzaffar]

please test

[cmsbuild]

Pull request #10414 was updated.

[cmsbuild]

+1

Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-2003ee/51920/summary.html
COMMIT: d78d67b
CMSSW: CMSSW_16_1_X_2026-03-11-2300/el8_amd64_gcc13
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week0/cms-sw/cmsdist/10414/51920/install.sh to create a dev area with all the needed externals and cmssw changes.

The following merge commits were also included on top of IB + this PR after doing git cms-merge-topic:

• @cms-sw set env for various build system so that each package respect the build jobs count #10409
• @cms-sw Set build time env so that edmPluginRefresh can find gpu-backend specfic libs #10412
• @cms-sw added support to build herwig7 and thepeg in debug mode #10411

You can see more details here:
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-2003ee/51920/git-recent-commits.json
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-2003ee/51920/git-merge-result

Comparison Summary

Summary:

• You potentially added 9 lines to the logs
• ROOTFileChecks: Some differences in event products or their sizes found
• Reco comparison results: 1 differences found in the comparisons
• DQMHistoTests: Total files compared: 53
• DQMHistoTests: Total histograms compared: 4185208
• DQMHistoTests: Total failures: 116
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 4185072
• DQMHistoTests: Total skipped: 20
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: 0.0 KiB( 52 files compared)
• Checked 227 log files, 198 edm output root files, 53 DQM output files
• TriggerResults: no differences found

[smuzaffar]

+externals

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next IB/CMSSW_16_1_X/master IBs (tests are also fine). This pull request will now be reviewed by the release team before it's merged. @ftenchini, @sextonkennedy, @mandrenguyen (and backports should be raised in the release meeting by the corresponding L2)