Cleaning up unused code for ITK pixel clustering

Part of the pixel clustering tool was modified for ITk reconstuction. It turned out not to be used anymore, therefore I'm cleaning it. I have also cleaned the indentation. RunTier0Tests.py runs successfully.

changed the description

added InnerDetector Tracking master labels

This merge request affects 1 package:

• InnerDetector/InDetRecTools/SiClusterizationTool

Adding @goetz ,@oda ,@amorley ,@sroe as watchers

added review-pending-level-1 label

CI Result SUCCESS (hash 3848b1d0)

	Athena	AthSimulation
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view
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 6029]

No outstanding issues, moving forward with approval. -L1

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

merged

mentioned in commit 357f55eb

added sweep:ignore label