Unset ldflags for builds

[captain-kark]

• Targeted PR against correct branch (see CONTRIBUTING.md)

• Linked to github-issue with discussion and accepted design OR link to spec that describes this work. (minor docs PR, can be closed directly if needed)

• Wrote tests (minor docs PR, no test impact)

• Updated relevant documentation (docs/)

• Added a relevant changelog entry to the Unreleased section in CHANGELOG.md

• Reviewed Files changed in the github PR explorer

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For Admin Use:

• Added appropriate labels to PR (ex. wip, ready-for-review, docs)
• Reviewers Assigned
• Squashed all commits, uses message "Merge PR #XYZ: [title]" (coding standards)

[alexanderbez]

@captain-kark please target this PR towards master ;-)

[alexanderbez]

ACK

[alessio]

ACKd

[alexanderbez]

@alessio do you know why CI is stuck?