Delete deprecated raster footprint functions

[jsignell]

Description: These functions were deprecated several releases ago, so should be ripe for deletion.

PR checklist:

• [x] Code is formatted (run scripts/format).
• [x] Code lints properly (run scripts/lint).
• [x] Tests pass (run scripts/test).
• [ ] Documentation has been updated to reflect changes, if applicable.
• [ ] Changes are added to the CHANGELOG.

[jsignell]

oops just saw the changelog note that this will be removed in 0.6.0