Remove unused files in OssimPlugins

Summary

Remove two files that are unused in OssimPlugins

Copyright

The copyright owner is CNES and has signed the ORFEO ToolBox Contributor License Agreement.

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Check before merging:

• All discussions are resolved
• At least 2 votes from core developers, no vote.
• The feature branch is (reasonably) up-to-date with the base branch
• Dashboard is green
• Copyright owner has signed the ORFEO ToolBox Contributor License Agreement
• Optionally, run git diff develop... -U0 --no-color | clang-format-diff.py -p1 -i on latest changes and commit

You may synchronize with develop to get a green pipeline.

added 11 commits

• 15ff5a7c...44a60a1a - 10 commits from branch develop
• 29d947b9 - MRG: Synchronize with branch develop

Compare with previous version

merged

mentioned in commit cf156962

added refactoring label

changed milestone to %7.0.0