MuonStationGeoHelpers: Fix clang warning.

Unused variable.

This merge request affects 1 package:

• MuonSpectrometer/MuonPhaseII/MuonDetDescr/MuonStationGeoHelpers

This merge request affects 1 file:

• MuonSpectrometer/MuonPhaseII/MuonDetDescr/MuonStationGeoHelpers/src/ActsMuonChamberTool.cxx

Adding @pscholer ,@kluit ,@rosati ,@toyamaza ,@pagessin ,@cvarni ,@stavrop ,@tbold ,@apsallid ,@jojungge as watchers

added ACTS MuonSpectrometer main review-pending-level-1 labels

added review-approved label

removed review-pending-level-1 label

CI Result SUCCESS (hash fae808b1)

	Athena
externals
cmake
make
tests

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For experts only: Jenkins output [CI-MERGE-REQUEST-EL9 1265]

merged

mentioned in commit ed95dd64