Code cleanup of SCTCalib (ATLASRECTS-4575)

Code cleanup of SCTCalib

• Remove unnecessary variables
• Remove undefined methods
• Add const to some methods

https://its.cern.ch/jira/browse/ATLASRECTS-4575

This merge request affects 1 package:

• InnerDetector/InDetCalibAlgs/SCT_CalibAlgs

Adding @oda as watcher

added InnerDetector master review-pending-level-1 labels

CI Result SUCCESS

	Athena	AthSimulation
externals
cmake
make
required tests
optional tests

Full details available at NICOS MR-20212-2019-01-08-08-08
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST 31983] (for remote access see the FAQ for MR reviewers)

added review-approved label and removed review-pending-level-1 label

merged

mentioned in commit 9689a996

added sweep:ignore label