Remove orb2 slam

[MarcelTorne]

Motivation and Context

We want to remove the orb-slam2 dependency for locobot and python3.

How Has This Been Tested

This has not been tested yet. (I will update this message once it is tested)

Types of changes

• Refactoring code to be able to remove the orb-slam2 dependency.

• Checklist

• [x] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [ ] I have read the CONTRIBUTING document.
• [ ] I have completed my CLA (see CONTRIBUTING)
• [ ] I have added tests to cover my changes.
• [ ] All new and existing tests passed.

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