remove mutable data-members of IdToFixedIdTool

Remove two mutable data members of the supposedly-const AlgTool IdToFixedIdTool.

• m_identifer: entirely unused
• m_fixedId: used but for no good reason

This merge request affects 1 package:

• MuonSpectrometer/MuonCalib/MuonCalibTools

Adding @rosati ,@wleight as watchers

added MuonSpectrometer master review-pending-level-1 labels

CI Result SUCCESS

	Athena	AthSimulation
externals
cmake
make
required tests
optional tests

Full details available at NICOS MR-26815-2019-09-26-22-42
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 3604]

added review-approved label

removed review-pending-level-1 label

Looks ok to me. Approved--L1

merged

mentioned in commit eec87469

added sweep:ignore label