osmo-bts[master]: cosmetic: tests/power: remove unused var "ret"

[Harald Welte]

Patch Set 3: Code-Review+2

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Gerrit-MessageType: comment
Gerrit-Change-Id: Ied484e3e2d3006eb0f03516ceaed3e0e802d51e4
Gerrit-PatchSet: 3
Gerrit-Project: osmo-bts
Gerrit-Branch: master
Gerrit-Owner: dexter <pma...@sysmocom.de>
Gerrit-Reviewer: Harald Welte <lafo...@gnumonks.org>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: Neels Hofmeyr <nhofm...@sysmocom.de>
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