Remove Tombloo's old default features

FYI: https://github.com/to/tombloo/commit/25188f4f19a70083ad7a52c425776f67478d09c0
     https://github.com/to/tombloo/commit/b7cde04bd201c44bd93b7758982e9ace53f8cf29

This features no longer work.
Goodbye, Strobo, Mosaic, "Download All Posts and Photos" Action!
Remove "Delete All Posts" Action using Progress

This patch no longer work.