migrate MatrixnetTransform to use ParamFileSvc

Gerhard Ravenrequested to merge
migrate-MatrixnetTransform into master

follow up to !2783 (merged): migrate MatrixnetTransform to use ParamFileSvc.

Also: remove spurious includes of <fstream> whilst hunting for more code which may need to be migrated to use ParamFileSvc

Edited by Gerhard Raven

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