Remove redundant html templates from `/thaliawebsite/templates/singlepages/`

Job Doesburg
2020-03-13T16:29:15+01:00

### One-sentence description Remove redundant html templates from `/thaliawebsite/templates/singlepages/` ### Why? They are redundant, since they are also in `/singlepages/templates` and these are the ones that are used. ### Current implementation It appears as if the translations are still in `/thaliawebsite` though, so it would probably be nice to move these. ### Suggested implementation